WALBRO CORP
8-A12G, 1998-07-08
MOTOR VEHICLE PARTS & ACCESSORIES
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<PAGE>   1
                                    FORM 8-A

                       SECURITIES AND EXCHANGE COMMISSION


                             WASHINGTON, D.C. 20549


                FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
                     PURSUANT TO SECTION 12(b) OR (g) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


                               WALBRO CORPORATION
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)



             DELAWARE                                           38-1358966
(STATE OF INCORPORATION OR ORGANIZATION)                    (I.R.S. EMPLOYER
                                                            IDENTIFICATION NO.)


 6242 GARFIELD STREET, CASS CITY, MICHIGAN                             48726
 (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)                            (ZIP CODE)

<TABLE>
         <S>                                                                      <C>

         If this Form relates to the                                              If this Form relates to the registration
         registration of a class of debt                                          of a class of debt securities and is to
         securities and is effective upon filing                                  become effective simultaneously with the
         pursuant to General Instruction                                          effectiveness of a concurrent
         A(c)(1) please check the following                                       registration statement under the
         box. / /                                                                 Securities Act of 1933 pursuant to
                                                                                  General Instruction A(c)(2) please check
                                                                                  the following box.  / /
</TABLE>


        SECURITIES TO BE REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:


                                      NONE


        SECURITIES TO BE REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT:


                         PREFERRED STOCK PURCHASE RIGHTS


<PAGE>   2



Item 1.  Description of Registrant's Securities to be Registered.

         On June 24, 1998, the Board of Directors of Walbro Corporation (the
"Company") declared a dividend of one Right for each outstanding common share (a
"Right"), par value $.50 per share (the "Common Shares"), of the Company. The
dividend is payable on July 17, 1998 (the "Record Date") to the stockholders of
record on that date. Each Right entitles the registered holder to purchase from
the Company one one-hundredth of a share of Series A Junior Participating
Preferred Stock, par value $.01 per share (the "Preferred Shares"), of the
Company at a price of $45 per one one-hundredth of a Preferred Share (the
"Purchase Price"), subject to adjustment. The Purchase Price was established by
the Board of Directors after consultations with and recommendations by its
financial advisor. Customary factors considered by the Board in determining the
Purchase Price included, without limitation, implied ranges of future stock
prices for the Company based upon potential and projected growth rates over a
ten-year period, and exercise prices (as a multiple of stock prices) set by
other companies adopting similar rights plans. The Purchase Price does not
reflect the Board's view of the current value of the Company.

         The description and terms of the Rights are set forth in a Rights
Agreement (the "Rights Agreement") between the Company and Harris Trust and
Savings Bank, as Rights Agent (the "Rights Agent").

         Until the earlier of (i) the close of business on the tenth day after
the first public announcement that a person or group of affiliated or associated
persons have acquired beneficial ownership of 15% or more of the outstanding
Common Shares (an "Acquiring Person"), or (ii) the close of business on the
tenth day (or such later date as may be determined by action of the Board of
Directors prior to such time as any Person becomes an Acquiring Person)
following the commencement of, or announcement of an intention to make, a tender
offer or exchange offer the consummation of which would result in the beneficial
ownership by such person or group of 15% or more of such outstanding Common
Shares (the earlier of such dates being called the "Distribution Date"), the
Rights will be evidenced by the Common Share certificates, will be transferable
only by the transfer of the Common Shares associated with such Rights and any
transfer of the Common Shares (including a transfer to the Company) will
constitute a transfer of the Rights. As described below, after a person or group
becomes an Acquiring Person, the Rights may not be redeemed or amended.

         Until the Distribution Date (or earlier redemption or expiration of the
Rights), new Common Share certificates issued after the Record Date, upon
transfer or new issuance of Common Shares, will contain a legend incorporating
the Rights Agreement by reference. Until the Distribution Date (or earlier
redemption or expiration of the Rights), the surrender for transfer of any
certificates for Common Shares outstanding as of the Record Date, even without
such notation will also constitute the transfer of the Rights associated with
the Common Shares represented by such certificate. As soon as practicable
following the Distribution Date, separate certificates evidencing the Rights
("Rights Certificates") will be mailed to holders of record of the Common Shares
as of the close of business on the Distribution Date and such separate Rights
Certificates alone will evidence the Rights.


                                       -2-

<PAGE>   3



         The Rights are not exercisable until the Distribution Date. The Rights
will expire on June 30, 2008 (the "Final Expiration Date"), unless the Final
Expiration Date is extended or unless the Rights are redeemed earlier by the
Company, in each case, as described below.

         If a person or group of affiliated or associated persons becomes an
"Acquiring Person" by obtaining beneficial ownership of more than 15% of the
then outstanding Common Shares, each holder of a Right (other than those
described in the next sentence) will thereafter have the right to receive, upon
exercise, Common Shares (or, in certain circumstances, cash, property or other
securities of the Company) having a value equal to two times the Purchase Price
of the Right. All Rights that are, or (under certain circumstances specified in
the Rights Agreement) were, beneficially owned by any Acquiring Person will be
void.

         At any time after the first date of public announcement by the Company
or an Acquiring Person than an Acquiring Person has become such (a "Shares
Acquisition Date"), if (i) the Company is the surviving corporation in a merger
with any other company or entity, (ii) the Company is acquired in a merger or
other business combination transaction, (iii) 50% or more of the Company's
consolidated assets or earning power are sold or (iv) an Acquiring Person
engages in certain "self-dealing" transactions with the Company, each holder of
an outstanding Right (other than those whose Rights have become void) will
thereafter have the right to receive, upon the exercise thereof at the then
current Purchase Price of the Right, that number of shares of common stock of
the surviving or acquiring company or the Acquiring Person, as the case may be,
which at the time of such transaction will have a market value of two times the
exercise price of such Right.

         At any time after a person or group becomes an Acquiring Person and
prior to the acquisition by such person or group of 50% or more of the
outstanding Common Shares, the Board of Directors of the Company may exchange
the Rights (other than Rights owned by an Acquiring Person which have become
void), in whole or in part, without any additional payment, for Common Shares at
an exchange ratio of one Common Share (or of a share of a class or series of the
Company's preferred shares having equivalent rights, preferences and
privileges), per Right (subject to adjustment).

         Rights surrendered for exercise must be accompanied by payment to the
Company of the then current exercise price by wire transfer, certified check,
cashier's check or money order. Some holders of Rights may find that the level
of the exercise price precludes them from exercising all or a portion of their
Rights. However, the Rights will be separately tradeable from and after the
Distribution Date, should such holders wish to transfer their Rights. There can
be no assurance that an active trading market for the Rights will develop.

         The Purchase Price payable, and the number of Preferred Shares or other
securities or property issuable, upon exercise of the Rights are subject to
adjustment from time to time to prevent dilution (i) in the event of a stock
dividend on, or a subdivision, combination or reclassification of, the Preferred
Shares, (ii) upon the grant to holders of the Preferred Shares of certain rights
or warrants to subscribe for or purchase Preferred Shares at a price, or
securities convertible into Preferred Shares with a conversion price, less than
the then-current market price of the Preferred Shares or (iii) upon the
distribution to holders of the Preferred Shares of evidences of indebtedness or
assets (excluding regular periodic cash dividends or

                                       -3-

<PAGE>   4



dividends payable in Preferred Shares) or of subscription rights or warrants
(other than those referred to above).

         Preferred Shares purchasable upon exercise of the Rights will not be
redeemable. Each Preferred Share will be entitled to an aggregate dividend of
100 times the dividend declared per Common Share. In the event of liquidation,
the holders of the Preferred Shares will be entitled to an aggregate payment of
100 times the payment made per Common Share. Each Preferred Share will have 100
votes, voting together with the Common Shares. In the event of any
consolidation, merger, combination or other transaction in which Common Shares
are exchanged for or changed into other stock or securities, cash and/or other
property, each Preferred Share will be entitled to receive 100 times the amount
received per Common Share. The foregoing dividend and liquidation rights of the
Preferred Shares are protected against dilution in the event additional Common
Shares are issued pursuant to a stock split, stock dividend or similar
recapitalization.

         Because of the nature of the dividend, liquidation and voting rights of
the Preferred Shares, the value of one one-hundredth of a Preferred Share
purchasable upon exercise of each Right should approximate the value of one
Common Share.

         With certain exceptions, no adjustment in the Purchase Price will be
required until cumulative adjustments require an adjustment of at least 1% in
such Purchase Price. No fractional Preferred Shares will be issued (other than
fractions which are integral multiples of one one-hundredth of a Preferred
Share, which may, at the election of the Company, be evidenced by depositary
receipts) and in lieu thereof, an adjustment in cash will be made based on the
market price of the Preferred Shares on the last trading day prior to the date
of exercise.

         At any time prior to the Shares Acquisition Date, the Board of
Directors of the Company may redeem all, but not less than all, of the Rights at
a price of $.01 per Right (the "Redemption Price"). The redemption of the Rights
may be made effective at such time, on such basis and with such conditions as
the Board of Directors in its sole discretion may establish. Immediately upon
any redemption of the Rights, the right to exercise the Rights will terminate
and the only right of the holders of Rights will be to receive the Redemption
Price.

         Any of the provisions of the Rights may be amended by the Board of
Directors of the Company prior to the Shares Acquisition Date. After the Shares
Acquisition Date, the provisions of the Rights Agreement may be amended by the
Board in order to make changes which do not adversely affect the interests of 
holders of Rights (excluding the interests of any Acquiring Person).

         Until a Right is exercised, the holder thereof, as such, will have no
rights as a stockholder of the Company, including, without limitation, the right
to vote or to receive dividends.

         The Rights have certain anti-takeover effects. The Rights should not
interfere with any merger or business combination approved by the Board of
Directors since the Rights may be redeemed by the Company at the Redemption
Price prior to the time that a person or group has acquired beneficial ownership
of 15% or more of the Common Shares. However, by causing

                                       -4-

<PAGE>   5



substantial dilution to a person or group that attempts to acquire the Company
on terms not approved by the Company's Board of Directors, the Rights may
interfere with certain acquisitions, including acquisitions that may offer a
premium over market price to some or all of the Company's stockholders. The
Board of Directors has stated that the Rights are not intended to prevent an
acquisition of the Company on terms that are favorable and fair to all
stockholders.

         As of July 3, 1998, there were 8,687,226 Common Shares outstanding.
Each outstanding Common Share on July 17, 1998 will have one Right attached
thereto. Until the Distribution Date, the Company will issue one Right with each
Common Share that shall become outstanding so that all such shares will have
attached Rights. 200,000 Preferred Shares are initially reserved for issuance
upon exercise of the Rights.


Item 2.  Exhibits.


Exhibit
Number            Description of Document

1                 Rights Agreement dated as of June 30, 1998 between Walbro
                  Corporation and Harris Trust and Savings Bank, which includes
                  as Exhibit A the Form of Certificate of Designations, as
                  Exhibit B the Form of Rights Certificate and as Exhibit C the
                  Summary of Rights to Purchase Preferred Stock. Pursuant to the
                  Rights Agreement, Rights Certificates will not be mailed until
                  after the Distribution Date (as that term is defined in the
                  Rights Agreement).





                                       -5-

<PAGE>   6



                                    SIGNATURE


         Pursuant to the requirements of Section 12 of the Securities Exchange
Act of 1934, the Registrant has duly caused this registration statement to be
signed on its behalf by the undersigned, thereunto duly authorized.



                                            WALBRO CORPORATION
                                            (Registrant)


Dated:  July 8, 1998                 By:    /s/ Michael A. Shope
                                            --------------------
                                            Michael A. Shope
                                            Chief Financial Officer
                                            



<PAGE>   7


                                Index to Exhibits



Exhibit No.    Exhibit                                               Page No. *
               
1              Rights Agreement dated as of June 30, 
               1998 between Walbro Corporation and 
               Harris Trust and Savings Bank, which 
               includes as Exhibit A the Form of 
               Certificate of Designations, as Exhibit 
               B the Form of Rights Certificate and as 
               Exhibit C the Summary of Rights to 
               Purchase Preferred Stock.  Pursuant to the
               Rights Agreement, Rights Certificates will 
               not be mailed until after the Distribution 
               Date (as that term is defined in the Rights 
               Agreement).






























*    Only on manually signed copy.








<PAGE>   1
                                                                       EXHIBIT 1

- -------------------------------------------------------------------------------




                               Walbro Corporation

                                       and


                          Harris Trust and Savings Bank

                                  Rights Agent

                                Rights Agreement

                            Dated as of June 30, 1998

- -------------------------------------------------------------------------------




<PAGE>   2



                                TABLE OF CONTENTS
<TABLE>
<CAPTION>
                  <S>                       <C>                                                                <C>

                                                                                                               Page
                  Section 1.                Certain Definitions.................................................  1
                  Section 2.                Appointment of Rights Agent.........................................  4
                  Section 3.                Issuance of Rights Certificates.....................................  4
                  Section 4.                Form of Rights Certificates.........................................  6
                  Section 5.                Countersignature and Registration...................................  7
                  Section 6.                Transfer, Split-Up, Combination and Exchange of Rights
                                            Certificates; Mutilated, Destroyed, Lost or Stolen Rights
                                            Certificates........................................................  8
                  Section 7.                Exercise of Rights; Purchase Price; Expiration Date of Rights.........8
                  Section 8.                Cancellation and Destruction of Rights Certificates................. 10
                  Section 9.                Availability of Capital Stock....................................... 10
                  Section 10.               Preferred Shares Record Date........................................ 12
                  Section 11.               Adjustment of Purchase Price, Number and Kind of Shares or
                                            Number of Rights.................................................... 12
                  Section 12.               Certificate of Adjusted Purchase Price or Number of Shares.......... 19
                  Section 13.               Consolidation, Merger or Sale or Transfer of Assets or Earning
                                            Power............................................................... 20
                  Section 14.               Fractional Rights and Fractional Shares............................. 22
                  Section 15.               Rights of Action.................................................... 23
                  Section 16.               Agreement of Rights Holders......................................... 24
                  Section 17.               Rights Certificate Holder Not Deemed a Stockholder.................. 25
                  Section 18.               Concerning the Rights Agent......................................... 25
                  Section 19.               Merger or Consolidation or Change of Name of Rights Agent........... 26
                  Section 20.               Duties of Rights Agent.............................................. 26
                  Section 21.               Change of Rights Agent.............................................. 28
                  Section 22.               Issuance of New Rights Certificates................................. 29
                  Section 23.               Redemption.......................................................... 29
                  Section 24.               Exchange............................................................ 30
                  Section 25.               Notice of Certain Events............................................ 31
                  Section 26.               Notices............................................................. 32
                  Section 27.               Supplements and Amendments.......................................... 32
                  Section 28.               Determination and Actions by the Board of Directors, etc............ 33
                  Section 29.               Successors.......................................................... 33
                  Section 30.               Benefits of this Agreement.......................................... 33
                  Section 31.               Severability........................................................ 33
                  Section 32.               Governing Law....................................................... 34
                  Section 33.               Counterparts........................................................ 34
                  Section 34.               Descriptive Headings................................................ 34

                  Signatures.....................................................................................35
</TABLE>


                                        i

<PAGE>   3


                                                                            Page

Exhibit A - Form of Certificate of Designations of Series A Junior
            Participating Preferred Stock of Walbro Corporation ............A-1

Exhibit B - Form of Rights Certificate......................................B-1

Exhibit C - Summary of Rights to Purchase Preferred Shares..................C-1


                                       ii

<PAGE>   4



                                RIGHTS AGREEMENT


         Agreement, dated as of June 30, 1998, between Walbro Corporation, a
Delaware corporation (the "Company"), and Harris Trust and Savings Bank (the
"Rights Agent").

         The Board of Directors of the Company has authorized and declared a
dividend of one preferred share purchase right (a "Right") for each Common Share
(as hereinafter defined) of the Company outstanding on July 17, 1998 (the
"Record Date"), each Right representing the right to purchase one one-hundredth
of a Preferred Share (as hereinafter defined), upon the terms and subject to the
conditions herein set forth, and has further authorized and directed the
issuance of one Right with respect to each Common Share that shall become
outstanding between the Record Date and the earliest of the Distribution Date,
the Redemption Date and the Final Expiration Date (as such terms are hereinafter
defined).

         Accordingly, in consideration of the premises and the mutual agreements
herein set forth, the parties hereby agree as follows:

         Section 1.   Certain Definitions.  For purposes of this Agreement, the
following terms have the meanings indicated:

                  (a) "Acquiring Person" shall mean any Person (as such term is
         hereinafter defined) who or which, together with all Affiliates and
         Associates (as such terms are hereinafter defined) of such Person,
         shall be the Beneficial Owner (as such term is hereinafter defined) of
         15% or more of the Common Shares of the Company then outstanding, but
         shall not include (i) the Company, (ii) any Subsidiary (as such term is
         hereinafter defined) of the Company, (iii) any employee benefit plan of
         the Company or any Subsidiary of the Company, or (iv) any entity
         organized, appointed or established by the Company for or pursuant to
         the terms of any such plan. Notwithstanding the foregoing, no Person
         shall become an "Acquiring Person" as the result of (a) an acquisition
         of Common Shares by the Company which, by reducing the number of shares
         outstanding, increases the proportionate number of shares beneficially
         owned by such Person to 15% or more of the Common Shares of the Company
         then outstanding or (b) the acquisition by such Person of newly issued
         Common Shares directly from the Company (it being understood that a
         purchase from an underwriter or other intermediary is not directly from
         the Company); provided, however, that if a Person shall become the
         Beneficial Owner of 15% or more of the Common Shares of the Company
         then outstanding by reason of share purchases by the Company or the
         receipt of newly-issued Common Shares directly from the Company and
         shall, after such share purchases or direct issuance by the Company,
         become the Beneficial Owner of any additional Common Shares of the
         Company, then such Person shall be deemed to be an "Acquiring Person".
         Notwithstanding the foregoing, if the Board of Directors of the Company
         determines in good faith that a Person who would otherwise be an
         "Acquiring Person", as defined pursuant to the foregoing provisions of
         this Section 1(a), has become such inadvertently, and such Person
         divests as promptly as practicable a sufficient number of Common Shares
         so that such Person would no longer be an Acquiring Person, as defined


<PAGE>   5



         pursuant to the foregoing provisions of this Section 1(a), then such
         Person shall not be deemed to be an "Acquiring Person" for any purposes
         of this Agreement.

                  (b) "Affiliate" and "Associate" shall have the respective
         meanings ascribed to such terms in Rule 12b-2 of the General Rules and
         Regulations under the Exchange Act as in effect on the date of this
         Agreement.

                  (c) A Person shall be deemed the "Beneficial Owner" of and
         shall be deemed to "beneficially own" any securities:

                             (i) which such Person or any of such Person's
                  Affiliates or Associates beneficially owns, directly or
                  indirectly;

                            (ii) which such Person or any of such Person's
                  Affiliates or Associates, directly or indirectly, has (A) the
                  right to acquire (whether such right is exercisable
                  immediately or only after the passage of time) pursuant to any
                  agreement, arrangement or understanding (other than customary
                  agreements with and between underwriters and selling group
                  members with respect to a bona fide public offering of
                  securities), or upon the exercise of conversion rights,
                  exchange rights, rights, warrants or options, or otherwise;
                  provided, however, that a Person shall not be deemed the
                  Beneficial Owner of, or to beneficially own, (x) securities
                  tendered pursuant to a tender or exchange offer made by or on
                  behalf of such Person or any of such Person's Affiliates or
                  Associates until such tendered securities are accepted for
                  purchase or exchange, (y) securities issuable upon exercise of
                  Rights at any time prior to the occurrence of a Triggering
                  Event or (z) securities issuable upon exercise of Rights from
                  and after the occurrence of a Triggering Event which Rights
                  were acquired by such Person or any of such Person's
                  Affiliates or Associates prior to the Distribution Date or
                  pursuant to Section 3(a) or Section 22 hereof (the "Original
                  Rights") or pursuant to Section 11(i) hereof in connection
                  with an adjustment made with respect to any Original Rights;
                  or (B) the sole or shared right to vote or dispose pursuant to
                  any agreement, arrangement or understanding; provided,
                  however, that a Person shall not be deemed the Beneficial
                  Owner of, or to beneficially own, any security if the
                  agreement, arrangement or understanding to vote such security
                  (1) arises solely from a revocable proxy or consent given to
                  such Person in response to a public proxy or consent
                  solicitation made pursuant to, and in accordance with, the
                  applicable rules and regulations promulgated under the
                  Exchange Act and (2) is not also then reportable on Schedule
                  13D or Schedule 13G under the Exchange Act (or any comparable
                  or successor report); or (C) has "beneficial ownership" of (as
                  determined pursuant to Rule 13d-3 of the General Rules and
                  Regulations under the Exchange Act); or



                                        2

<PAGE>   6



                           (iii) which are beneficially owned, directly or
                  indirectly, by any other Person (or any Affiliate or Associate
                  thereof) with which such Person or any of such Person's
                  Affiliates or Associates has any agreement, arrangement or
                  understanding, whether written or oral (other than customary
                  agreements with and between underwriters and selling group
                  members with respect to a bona fide public offering of
                  securities), for the purpose of acquiring, holding, voting
                  (except to the extent contemplated by the proviso to Section
                  1(c)(ii)(B)) or disposing of any securities of the Company.

                  Notwithstanding anything in this definition of Beneficial
         Ownership to the contrary, the phrase "then outstanding," when used
         with reference to a Person's Beneficial Ownership of securities of the
         Company, shall mean the number of such securities then issued and
         outstanding together with the number of such securities not then
         actually issued and outstanding which such Person would be deemed to
         own beneficially hereunder.

                  (d) "Business Day" shall mean any day other than a Saturday, a
         Sunday or a day on which banking institutions in Illinois are
         authorized or obligated by law or executive order to close.

                  (e) "Close of Business" on any given date shall mean 5:00
         P.M., Chicago, Illinois time, on such date; provided, however, that if
         such date is not a Business Day it shall mean 5:00 P.M., Chicago,
         Illinois time, on the next succeeding Business Day.

                  (f) "Common Shares" when used with reference to the Company
         shall mean the shares of Common Stock, par value $.50 per share, of the
         Company. "Common Shares" when used with reference to any Person other
         than the Company shall mean the capital stock (or equity interest) of
         such other Person with the greatest voting power, or the equity
         securities or other equity interest having power to control or direct
         the management of such Person.

                  (g) "Distribution Date" shall have the meaning set forth in
         Section 3 hereof.

                  (h) "Exchange Act" shall mean the Securities Exchange Act of
         1934, as amended.

                  (i) "Final Expiration Date" shall have the meaning set forth
         in Section 7 hereof.

                  (j) "Person" shall mean any individual, firm, corporation or
         other entity, and shall include any successor (by merger or otherwise)
         of such entity.

                  (k) "Preferred Shares" shall mean shares of Series A Junior
         Participating Preferred Stock, par value $.01 per share, of the Company
         having the rights and

                                        3

<PAGE>   7



         preferences set forth in the Form of Certificate of Designations 
         attached to this Agreement as Exhibit A.

                  (l) "Redemption Date" shall have the meaning set forth in
         Section 7 hereof.

                  (m) "Section 11(a)(ii) Event" shall mean an event described in
         Section 11(a)(ii) hereof.

                  (n) "Shares Acquisition Date" shall mean the first date of
         public announcement (which for purposes of this definition, shall
         include, without limitation, a report filed pursuant to Section 13(d)
         under the Exchange Act) by the Company or an Acquiring Person that an
         Acquiring Person has become such.

                  (o) "Subsidiary" of any Person shall mean any corporation or
         other entity of which a majority of the voting power of the voting
         equity securities or equity interest is owned, directly or indirectly,
         by such Person.

                  (p) "Triggering Event" shall mean a Section 11(a)(ii) Event or
         an event described in Section 13(a) hereof.

         Section 2. Appointment of Rights Agent. The Company hereby appoints the
Rights Agent to act as agent for the Company in accordance with the terms and
conditions hereof, and the Rights Agent hereby accepts such appointment. The
Company may from time to time appoint such co-Rights Agents as it may deem
necessary or desirable.

         Section 3.   Issuance of Rights Certificates.

                  (a) Until the earlier of (i) the Close of Business on the
         tenth day after the Shares Acquisition Date or (ii) the Close of
         Business on the tenth Business Day (or such later date as may be
         determined by action of the Board of Directors prior to such time as
         any Person becomes an Acquiring Person) after the date of the
         commencement by any Person (other than the Company, any Subsidiary of
         the Company, any employee benefit plan of the Company or of any
         Subsidiary of the Company or any person or entity organized, appointed
         or established by the Company for or pursuant to the terms of any such
         plan) of, or of the first public announcement of the intention of any
         Person (other than the Company, any Subsidiary of the Company, any
         employee benefit plan of the Company or of any Subsidiary of the
         Company or any person or entity organized, appointed or established by
         the Company for or pursuant to the terms of any such plan) to commence,
         a tender or exchange offer the consummation of which would result in
         any Person becoming the Beneficial Owner of Common Shares aggregating
         15% or more of the then outstanding Common Shares (including any such
         date which is after the date of this Agreement and prior to the
         issuance of the Rights; the earlier of such dates being herein referred
         to as the "Distribution Date"), (x) the Rights will be evidenced
         (subject to the provisions of Section 3(b) hereof) by the certificates
         for Common Shares registered

                                        4

<PAGE>   8



         in the names of the holders thereof (which certificates shall also be
         deemed to be certificates for Rights) and not by separate certificates,
         (y) the Rights will be transferable only in connection with the
         transfer of Common Shares and (z) each transfer of Common Shares
         (including a transfer to the Company) shall constitute a transfer of
         the Rights associated with such Common Shares. As soon as practicable
         after the Distribution Date, the Company will prepare and execute, the
         Rights Agent will countersign, and the Company will send or cause to be
         sent (and the Rights Agent will, if requested, send at the expense of
         the Company) by first-class, insured, postage-prepaid mail, to each
         record holder of Common Shares as of the Close of Business on the
         Distribution Date, at the address of such holder shown on the records
         of the Company, a Rights Certificate, in substantially the form of
         Exhibit B hereto (a "Rights Certificate"), evidencing one Right for
         each Common Share so held. As of the Distribution Date, the Rights will
         be evidenced solely by such Rights Certificates.

                  (b) On the Record Date, or as soon as practicable thereafter,
         the Company will send a copy of a Summary of Rights to Purchase
         Preferred Shares, in substantially the form of Exhibit C hereto (the
         "Summary of Rights"), by first-class, postage-prepaid mail, to each
         record holder of Common Shares as of the close of business on the
         Record Date, at the address of such holder shown on the records of the
         Company. With respect to certificates for Common Shares outstanding as
         of the Record Date, until the Distribution Date, the Rights will be
         evidenced by such certificates registered in the names of the holders
         thereof together with a copy of the Summary of Rights attached thereto.
         Until the Distribution Date (or the earlier of the Redemption Date or
         the Final Expiration Date), the surrender for transfer of any
         certificate for Common Shares outstanding on the Record Date, with or
         without a copy of the Summary of Rights attached thereto, shall also
         constitute the transfer of the Rights associated with the Common Shares
         represented thereby.

                  (c) Certificates for Common Shares which become outstanding
         (including, without limitation, reacquired Common Shares referred to in
         the last sentence of this Section 3 (c)) after the Record Date but
         prior to the earliest of the Distribution Date, the Redemption Date or
         the Final Expiration Date shall have impressed on, printed on, written
         on or otherwise affixed to them the following legend:

                  This certificate also evidences and entitles the holder hereof
                  to certain rights as set forth in a Rights Agreement between
                  Walbro Corporation and Harris Trust and Savings Bank dated as
                  of June 30, 1998 (the "Rights Agreement"), the terms of which
                  are hereby incorporated herein by reference and a copy of
                  which is on file at the principal executive offices of Walbro
                  Corporation. Under certain circumstances, as set forth in the
                  Rights Agreement, such Rights will be evidenced by separate
                  certificates and will no longer be evidenced by this
                  certificate. Walbro Corporation will mail to the holder of
                  this certificate a copy of the Rights Agreement

                                        5

<PAGE>   9



                  without charge after receipt of a written request therefor. As
                  described in the Rights Agreement, Rights issued to any Person
                  who becomes an Acquiring Person or any Associate or Affiliate
                  thereof (all as defined in the Rights Agreement) shall become
                  null and void.

         With respect to such certificates containing the foregoing legend,
         until the Distribution Date, the Rights associated with the Common
         Shares represented by such certificates shall be evidenced by such
         certificates alone, and the surrender for transfer of any such
         certificate shall also constitute the transfer of the Rights associated
         with the Common Shares represented thereby. In the event that the
         Company purchases or acquires any Common Shares after the Record Date
         but prior to the Distribution Date, any Rights associated with such
         Common Shares shall be deemed cancelled and retired so that the Company
         shall not be entitled to exercise any Rights associated with the Common
         Shares which are no longer outstanding.

         Section 4.   Form of Rights Certificates.

                  (a) The Rights Certificates and the forms of election to
         purchase and of assignment to be printed on the reverse thereof, shall
         be substantially the same as Exhibit B hereto, and may have such marks
         of identification or designation and such legends, summaries or
         endorsements printed thereon as the Company may deem appropriate and as
         are not inconsistent with the provisions of this Agreement, or as may
         be required to comply with any applicable law or with any rule or
         regulation made pursuant thereto or with any rule or regulation of any
         stock exchange on which the Rights may from time to time be listed, or
         to conform to usage. Subject to the terms, provisions and restrictions
         elsewhere herein, the Rights Certificates shall entitle the holders
         thereof to purchase such number of one one-hundredths of a Preferred
         Share as shall be set forth therein at the price per one one-hundredth
         of a Preferred Share set forth therein (the "Purchase Price"), but the
         amount and type of securities purchasable upon the exercise of each
         Right and the Purchase Price shall be subject to adjustment as provided
         herein.

                  (b) Any Rights Certificate issued pursuant to Section 3(a) or
         Section 22 hereof that represents Rights beneficially owned by: (i) an
         Acquiring Person or any Associate or Affiliate of an Acquiring Person,
         (ii) a transferee of an Acquiring Person (or of any such Associate or
         Affiliate) who becomes a transferee after the Acquiring Person becomes
         such, or (iii) a transferee of an Acquiring Person (or of any such
         Associate or Affiliate) who becomes a transferee prior to or
         concurrently with the Acquiring Person becoming such and receives such
         Rights pursuant to either (A) a transfer (whether or not for
         consideration) from the Acquiring Person to holders of equity interests
         in such Acquiring Person or to any Person with whom such Acquiring
         Person has any continuing agreement, arrangement or understanding,
         whether written or oral, regarding the transferred Rights or (B) a
         transfer which the Board of Directors of the Company has

                                        6

<PAGE>   10



         determined in good faith is part of a plan, arrangement or
         understanding, whether written or oral, which has as a primary purpose
         or effect avoidance of the second paragraph of Section 11(a)(ii)
         hereof, and any Rights Certificate issued pursuant to Section 6 or
         Section 11 hereof upon transfer, exchange, replacement or adjustment of
         any other Rights Certificate referred to in this sentence, shall
         contain (to the extent feasible) the following legend:

                  The Rights represented by this Rights Certificate are or were
                  beneficially owned by a Person who was or became an Acquiring
                  Person or an Affiliate or Associate of an Acquiring Person (as
                  such terms are defined in the Rights Agreement). Accordingly,
                  this Rights Certificate and the Rights represented hereby may
                  become null and void in the circumstances specified in Section
                  11(a)(ii) of such Agreement.

         The provisions of the second paragraph of Section 11(a)(ii) shall apply
whether or not any Rights Certificate actually contains the foregoing legend.

         Section 5. Countersignature and Registration. The Rights Certificates
shall be executed on behalf of the Company by its Chairman of the Board, its
Chief Executive Officer, its President, any of its Vice Presidents, or its
Treasurer, either manually or by facsimile signature, shall have affixed thereto
the Company's seal or a facsimile thereof, and shall be attested by the
Secretary or an Assistant Secretary of the Company, either manually or by
facsimile signature. The Rights Certificates shall be manually countersigned by
the Rights Agent and shall not be valid for any purpose unless countersigned. In
case any officer of the Company who shall have signed any of the Rights
Certificates shall cease to be such officer of the Company before
countersignature by the Rights Agent and issuance and delivery by the Company,
such Rights Certificates, nevertheless, may be countersigned by the Rights Agent
and issued and delivered by the Company with the same force and effect as though
the Person who signed such Rights Certificates had not ceased to be such officer
of the Company; and any Rights Certificate may be signed on behalf of the
Company by any Person who, at the actual date of the execution of such Rights
Certificate, shall be a proper officer of the Company to sign such Rights
Certificate, although at the date of the execution of this Rights Agreement any
such Person was not such an officer.

         Following the Distribution Date, the Rights Agent will keep or cause to
be kept, at its principal office, books for registration and transfer of the
Rights Certificates of each series issued hereunder. Such books shall show the
names and addresses of the respective holders of the Rights Certificates, the
number of Rights evidenced on its face by each of the Rights Certificates and
the date of each of the Rights Certificates.


                                        7

<PAGE>   11



         Section 6.  Transfer, Split-Up, Combination and Exchange of Rights 
Certificates; Mutilated, Destroyed, Lost or Stolen Rights Certificates.

                  (a) Subject to the provisions of Sections 4(b), 14 and 24
         hereof, at any time after the Close of Business on the Distribution
         Date, and at or prior to the Close of Business on the earlier of the
         Redemption Date or the Final Expiration Date, any Rights Certificate or
         Rights Certificates (other than Rights Certificates representing Rights
         that have become void pursuant to Section 11(a)(ii) hereof or that have
         been exchanged pursuant to Section 24 hereof) may be transferred,
         split-up, combined or exchanged for another Rights Certificate or
         Rights Certificates, entitling the registered holder to purchase a like
         number of one one-hundredths of a Preferred Share (or Common Shares,
         other securities or property, as the case may be) as the Rights
         Certificate or Rights Certificates surrendered then entitle such holder
         to purchase. Any registered holder desiring to transfer, split-up,
         combine or exchange any Rights Certificate or Rights Certificates shall
         make such request in writing delivered to the Rights Agent, and shall
         surrender the Rights Certificate or Rights Certificates to be
         transferred, split-up, combined or exchanged at the principal office of
         the Rights Agent. Neither the Rights Agent nor the Company shall be
         obligated to take any action whatsoever with respect to the transfer of
         any such surrendered Rights Certificate until the registered holder
         shall have completed and signed the certificate contained in the form
         of assignment on the reverse side of such Rights Certificate and shall
         have provided such additional evidence of the identity of the
         Beneficial Owner (or former Beneficial Owner) or Affiliates or
         Associates thereof as the Company shall reasonably request. Thereupon
         the Rights Agent shall, subject to Sections 4 and 11(a)(ii) hereof,
         countersign and deliver to the Person entitled thereto a Rights
         Certificate or Rights Certificates, as the case may be, as so
         requested. The Company may require payment of a sum sufficient to cover
         any tax or governmental charge that may be imposed in connection with
         any transfer, split-up, combination or exchange of Rights Certificates.

                  (b) Upon receipt by the Company and the Rights Agent of
         evidence reasonably satisfactory to them of the loss, theft,
         destruction or mutilation of a Rights Certificate, and, in case of
         loss, theft or destruction, of indemnity or security reasonably
         satisfactory to them, and, at the Company's request, reimbursement to
         the Company and the Rights Agent of all reasonable expenses incidental
         thereto, and upon surrender to the Rights Agent and cancellation of the
         Rights Certificate, if mutilated, the Company will make and deliver a
         new Rights Certificate of like tenor to the Rights Agent for delivery
         to the registered holder in lieu of the Rights Certificate so lost,
         stolen, destroyed or mutilated.

         Section 7.  Exercise of Rights; Purchase Price; Expiration Date of 
                     Rights.

                  (a) Subject to Section 11(a)(ii) hereof, the registered holder
         of any valid Rights Certificate may exercise the Rights evidenced
         thereby (except as otherwise provided herein including, without
         limitation, the restrictions on exercisability set forth in Section
         9(c) hereof) in whole or in part at any time after the Distribution
         Date upon surrender

                                      8

<PAGE>   12



         of the Rights Certificate, with the form of election to purchase on the
         reverse side thereof duly executed, to the Rights Agent at the
         principal office of the Rights Agent, together with payment of the
         Purchase Price (as defined below) for each one one-hundredth of a
         Preferred Share (or Common Shares, other securities, cash or other
         assets, as the case may be) as to which the Rights are exercised, at or
         prior to the earliest of (i) the close of business on June 30, 2008
         (the "Final Expiration Date"), (ii) the time at which the Rights are
         redeemed as provided in Section 23 hereof (the "Redemption Date"), or
         (iii) the time at which such Rights are exchanged as provided in
         Section 24 hereof.

                  (b) The Purchase Price for each one one-hundredth of a
         Preferred Share to be issued upon exercise of a Right shall initially
         be $45.00, shall be subject to adjustment from time to time as provided
         in Sections 11 and 13 hereof and shall be payable in lawful money of
         the United States of America in accordance with paragraph (c) below.

                  (c) Upon receipt of a Rights Certificate representing
         exercisable Rights, with the form of election to purchase and the
         certificate on the reverse side of the Rights Certificate duly
         executed, accompanied by payment of the Purchase Price for the shares
         (or other securities or property, as the case may be) to be purchased
         and an amount equal to any applicable transfer tax required to be paid
         by the holder of such Rights Certificate in accordance with Section 9
         hereof by wire transfer, certified check, cashier's check or money
         order payable to the order of the Company, or such other payment method
         reasonably required by the Company, the Rights Agent shall thereupon
         promptly (i) (A) requisition from any transfer agent of the Preferred
         Shares (or make available if the Rights Agent is the transfer agent of
         the Preferred Shares) certificates for the number of Preferred Shares
         to be purchased and the Company hereby irrevocably authorizes its
         transfer agent to comply with all such requests or (B) requisition from
         the depositary agent depositary receipts as provided in Section 14(b)
         hereof, representing such number of one one-hundredths of a Preferred
         Share as are to be purchased (in which case certificates for the
         Preferred Shares represented by such receipts shall be deposited by the
         transfer agent with the depositary agent and the Company hereby directs
         the depositary agent to comply with such request, (ii) when
         appropriate, requisition from the Company or such other entity the
         amount of cash to be paid in lieu of issuance of fractional shares in
         accordance with Section 14 hereof, (iii) after receipt of such
         certificates or depositary receipts, cause the same to be delivered to
         or upon the order of the registered holder of such Rights Certificate,
         registered in such name or names as may be designated by such holder,
         and (iv) when appropriate, after receipt, deliver such cash to or upon
         the order of the registered holder of such Rights Certificate. In the
         event that the Company elects or is obligated to issue other securities
         (including Common Shares) of the Company, pay cash and/or distribute
         other property pursuant to Section 11(a)(iii) hereof, the Company will
         make all arrangements necessary so that such other securities, cash
         and/or property are available for distribution by the Rights Agent, if
         and when appropriate.


                                        9

<PAGE>   13



                  (d) In case the registered holder of any Rights Certificate
         shall exercise less than all the Rights evidenced thereby, a new Rights
         Certificate evidencing Rights equivalent to the Rights remaining
         unexercised shall be issued by the Rights Agent to the registered
         holder of such Rights Certificate or to his duly authorized assigns,
         subject to the provisions of Section 14 hereof.

                  (e) Notwithstanding anything in this Agreement to the
         contrary, neither the Rights Agent nor the Company shall be obligated
         to undertake any action with respect to a registered holder upon the
         occurrence of any purported exercise as set forth in this Section 7
         unless such registered holder shall have (i) completed and signed the
         certificate contained in the form of election to purchase set forth on
         the reverse side of the Rights Certificate surrendered for such
         exercise, and (ii) provided such additional evidence of the identity of
         the Beneficial Owner (or former Beneficial Owner) or Affiliates or
         Associates thereof as the Company shall reasonably request.

                  (f) Notwithstanding any statement to the contrary contained in
         this Agreement or in any Rights Certificate, if the Distribution Date
         or the Shares Acquisition Date shall occur prior to the Record Date,
         the provisions of this Agreement, including (without limitation)
         Sections 3 and 11(a)(ii), shall be applicable to the Rights upon their
         issuance to the same extent such provisions would have been applicable
         if the Record Date were the date of this Agreement.

         Section 8.  Cancellation and Destruction of Rights Certificates. All
Rights Certificates surrendered for the purpose of exercise, transfer, split-up,
combination or exchange shall, if surrendered to the Company or to any of its
agents, be delivered to the Rights Agent for cancellation or in cancelled form,
or, if surrendered to the Rights Agent, shall be cancelled by it, and no Rights
Certificates shall be issued in lieu thereof except as expressly permitted by
any of the provisions of this Rights Agreement. The Company shall deliver to the
Rights Agent for cancellation and retirement, and the Rights Agent shall so
cancel and retire, any other Rights Certificate purchased or acquired by the
Company otherwise than upon the exercise thereof. The Rights Agent shall deliver
all cancelled Rights Certificates to the Company, or shall, at the written
request of the Company, destroy such cancelled Rights Certificates, and in such
case shall deliver a certificate of destruction thereof to the Company.

         Section 9.  Availability of Capital Stock.

                  (a) The Company covenants and agrees that it will cause to be
         reserved and kept available out of its authorized and unissued
         Preferred Shares (and, following the occurrence of a Distribution Date,
         out of its authorized and unissued Common Shares and/or other
         securities or out of its authorized and issued shares held in its
         treasury), the number of Preferred Shares (or Common Shares and/or
         other securities, as the case may be) that will be sufficient to permit
         the exercise in full of all outstanding Rights as provided in this
         Agreement.


                                       10

<PAGE>   14



                  (b) The Company covenants and agrees that it will take all
         such action as may be necessary to ensure that all Preferred Shares (or
         Common Shares and/or other securities, as the case may be) delivered
         upon exercise of Rights shall be, at the time of delivery of the
         certificates for such Preferred Shares (or Common Shares and/or other
         securities, as the case may be) (subject to any necessary payment of
         the Purchase Price), duly and validly authorized and issued and fully
         paid and nonassessable shares.

                  (c) The Company further covenants and agrees that it will pay
         when due and payable any and all federal and state transfer taxes and
         charges which may be payable in respect of the issuance or delivery of
         the Rights Certificates or of any Preferred Shares (or Common Shares
         and/or other securities, as the case may be) upon the exercise of
         Rights. The Company shall not, however, be required to pay any transfer
         tax which may be payable in respect of any transfer or delivery of
         Rights Certificates to a Person other than, or the issuance or delivery
         of certificates or depositary receipts for the Preferred Shares (or
         Common Shares and/or other securities, as the case may be) in a name
         other than that of, the registered holder of the Rights Certificate
         evidencing Rights surrendered for exercise or to issue or to deliver
         any certificates or depositary receipts for Preferred Shares (or Common
         Shares and/or other securities, as the case may be) upon the exercise
         of any Rights until any such tax shall have been paid (any such tax
         being payable by the holder of such Rights Certificate at the time of
         surrender) or until it has been established to the Company's reasonable
         satisfaction that no such tax is due.

                  (d) So long as the Preferred Shares (and, following the
         occurrence of a Distribution Date, Common Shares and/or other
         securities, as the case may be) issuable and deliverable upon the
         exercise of the Rights may be listed on any inter-dealer quotation
         system or national securities exchange, the Company shall use its best
         efforts to cause, from and after such time as the Rights become
         exercisable, all shares reserved for such issuance to be listed on such
         exchange upon official notice of issuance upon such exercise.

                  (e) The Company shall use its best efforts to (i) file on the
         appropriate form, as soon as practicable following the earliest date
         after the first occurrence of a Section 11(a)(ii) Event on which the
         consideration to be delivered by the Company upon exercise of the
         Rights has been determined hereunder, a registration statement under
         the Securities Act of 1933, as amended (the "Act"), with respect to the
         securities purchasable upon exercise of the Rights, (ii) cause such
         registration statement to become effective as soon as practicable after
         such filing, and (iii) cause such registration statement to remain
         effective (with a prospectus at all times meeting the requirements of
         the Act) until the earlier of (A) the date as of which the Rights are
         no longer exercisable for such securities, and (B) the Final Expiration
         Date. The Company may temporarily suspend, for a period of time not to
         exceed ninety (90) days after the date set forth in clause (i) of the
         first sentence of this Section 9(e), the exercisability of the Rights
         in order to prepare and file such registration statement and permit it
         to become effective. Upon any such suspension, the Company shall issue
         a public announcement stating that the

                                       11

<PAGE>   15



         exercisability of the Rights has been temporarily suspended, as well as
         a public announcement at such time as the suspension is no longer in
         effect. In addition, if the Company shall determine that a registration
         statement is required following the Distribution Date, the Company may
         temporarily suspend the exercisability of the Rights until such time as
         a registration statement has been declared effective. The Company will
         also take such action as may be appropriate under, or to ensure
         compliance with, the securities or "blue sky" laws of the various
         states in connection with the exercisability of the Rights.
         Notwithstanding any provision of this Agreement to the contrary, the
         Rights shall not be exercisable in any jurisdiction if the requisite
         qualification in such jurisdiction shall not have been obtained, the
         exercise thereof shall not be permitted under applicable law or a
         registration statement shall not have been declared effective.

         Section 10. Preferred Shares Record Date. Each Person in whose name any
certificate for Preferred Shares (or Common Shares and/or other securities, as
the case may be) is issued upon the exercise of Rights shall for all purposes be
deemed to have become the holder of record of the Preferred Shares (or Common
Shares and/or other securities, as the case may be) represented thereby on, and
such certificate shall be dated, the date upon which the Rights certificate
evidencing such Rights was duly surrendered and payment of the applicable
Purchase Price (and any applicable transfer taxes) was made (or Rights were duly
surrendered in exchange for Common Shares pursuant to Section 24 hereof);
provided, however, that if the date of such surrender and payment is a date upon
which the Preferred Shares (or Common Shares and/or other securities, as the
case may be) transfer books of the Company are closed, such Person shall be
deemed to have become the record holder of such shares on, and such certificate
shall be dated, the next succeeding Business Day on which the Preferred Shares
(or Common Shares and/or other securities, as the case may be) transfer books of
the Company are open. Prior to the exercise of the Rights evidenced thereby, the
holder of a Rights Certificate shall not be entitled to any rights of a holder
of Preferred Shares (or Common Shares and/or other securities, as the case may
be) for which the Rights shall be exercisable, including, without limitation,
the right to vote, to receive dividends or other distributions or to exercise
any preemptive rights, and shall not be entitled to receive any notice of any
proceedings of the Company, except as provided herein.

         Section 11. Adjustment of Purchase Price, Number and Kind of Shares or
Number of Rights. The Purchase Price, the number and kind of shares covered by
and obtainable upon exercise of each Right, and the number of Rights
outstanding, are subject to adjustment from time to time as provided in Sections
11 and 13 of this Agreement.

                            (a) (i) In the event the Company shall at any time
                  after the date of this Agreement (A) declare a dividend on the
                  Preferred Shares payable in Preferred Shares, (B) subdivide
                  the outstanding Preferred Shares, (C) combine the outstanding
                  Preferred Shares into a smaller number of Preferred Shares or
                  (D) issue any shares of its capital stock in a
                  reclassification of the Preferred Shares (including any such
                  reclassification in connection with a consolidation or merger
                  in which the Company is the continuing or surviving
                  corporation), except as

                                       12

<PAGE>   16



                  otherwise provided in this Section 11(a), the Purchase Price
                  in effect at the time of the record date for such dividend or
                  of the effective date of such subdivision, combination or
                  reclassification, and the number and kind of shares of capital
                  stock issuable on such date, shall be proportionately adjusted
                  so that the holder of any Right exercised after such time
                  shall be entitled to receive the aggregate number and kind of
                  shares of capital stock which, if such Right had been
                  exercised immediately prior to such date and at a time when
                  the Preferred Shares transfer books of the Company were open,
                  he would have owned upon such exercise and been entitled to
                  receive by virtue of such dividend, subdivision, combination
                  or reclassification; provided, however, that in no event shall
                  the consideration to be paid upon the exercise of one Right be
                  less than the aggregate par value of the shares of capital
                  stock of the Company issuable upon exercise of one Right. If
                  an event occurs which would require adjustment under both
                  Section 11(a)(i) and Section 11(a)(ii), the adjustment
                  provided for in this Section 11(a)(i) shall be in addition to,
                  and shall be made prior to, any adjustment required pursuant
                  to Section 11(a)(ii).

                                   (ii) Subject to Section 24 of this Agreement,
                  in the event any Person shall become an Acquiring Person, each
                  holder of a valid Right shall thereafter have a right to
                  receive, upon exercise thereof at a price equal to the then
                  current Purchase Price multiplied by the number of one
                  one-hundredths of a Preferred Share for which a Right is then
                  exercisable, in accordance with the terms of this Agreement,
                  and in lieu of Preferred Shares, such number of Common Shares
                  of the Company as shall equal the result obtained by (x)
                  multiplying the then current Purchase Price by the number of
                  one one-hundredths of a Preferred Share for which, a Right is
                  then exercisable and dividing that product by (y) 50% of the
                  then current per share market price of the Company's Common
                  Shares (determined pursuant to Section 11(d) hereof) on the
                  date of the occurrence of the event described above. In the
                  event that any Person shall become an Acquiring Person and the
                  Rights shall then be outstanding, the Company shall not take
                  any action which would eliminate or diminish the benefits
                  intended to be afforded by the Rights.

                          From and after the time when a Person becomes an 
                  Acquiring Person (a "Section 11(a)(ii) Event") any Rights
                  that are or were acquired or beneficially owned by (i) any
                  Acquiring Person (or any Associate or Affiliate of such
                  Acquiring Person), (ii) a transferee of such Acquiring
                  Person (or of any such Associate or Affiliate) who becomes a
                  transferee after the Acquiring Person became an Acquiring
                  Person or (iii) a transferee of such Acquiring Person (or of
                  any such Associate or Affiliate) who becomes a transferee
                  prior to or concurrently with the Acquiring Person's becoming
                  an Acquiring Person and receives such Rights pursuant to
                  either (A) a transfer (whether or not for consideration) from
                  the Acquiring Person to holders of equity interests in such
                  Acquiring Person or to any Person with whom the Acquiring
                  Person has any

                                       13

<PAGE>   17



                  continuing agreement, arrangement or understanding, whether
                  written or oral, regarding the transferred Rights or (B) a
                  transfer which the Board of Directors has determined in good
                  faith is part of a plan, arrangement or understanding, whether
                  written or oral, which has as a primary purpose or effect the
                  avoidance of this Section 11(a)(ii), shall each be void and
                  any holder of such Rights shall thereafter have no exercise or
                  any other rights whatsoever with respect to such Rights under
                  any provision of this Agreement or otherwise. No Rights
                  Certificate shall be issued pursuant to Section 3, this
                  Section 11(a)(ii) or Section 24 that represents Rights
                  beneficially owned by an Acquiring Person or any Associate or
                  Affiliate thereof whose Rights would be void pursuant to the
                  preceding sentence; no Rights Certificate shall be issued at
                  any time upon the transfer of any Rights to an Acquiring
                  Person or any Associate or Affiliate thereof whose Rights
                  would be void pursuant to the preceding sentence or to any
                  nominee of such Acquiring Person, Associate or Affiliate; and
                  any Rights Certificate delivered to the Rights Agent for
                  transfer to an Acquiring Person, Associate or Affiliate
                  thereof whose Rights would be void pursuant to the preceding
                  sentence shall be cancelled.

                                   (iii) In lieu of issuing Common Shares of the
                  Company in accordance with Section 11(a)(ii) hereof, the
                  Company may, in the sole discretion of the Board of Directors,
                  elect to (and, in the event that the Board of Directors has
                  not exercised the exchange right contained in Section 24
                  hereof and there are not sufficient issued but not outstanding
                  and authorized but unissued Common Shares to permit the
                  exercise in full of the Rights in accordance with the
                  foregoing subparagraph (ii), the Company shall) take all such
                  action as may be necessary to authorize, issue or pay, upon
                  the exercise of the Rights, cash (including by way of a
                  reduction of the Purchase Price), property, other securities
                  or any combination thereof having an aggregate value equal to
                  the value of the Common Shares of the Company which otherwise
                  would have been issuable pursuant to Section 11(a)(ii), which
                  aggregate value shall be determined by the Board of Directors.
                  For purposes of the preceding sentence, the value of the
                  Common Shares shall be determined pursuant to Section 11(d)
                  hereof and the value of any equity securities which the Board
                  of Directors determines to be a "common stock equivalent"
                  (including the Preferred Shares, in such ratio as the Board of
                  Directors shall determine) shall be deemed to have the same
                  value as the Common Shares. Any such election by the Board of
                  Directors must be made and publicly announced within 60 days
                  following the date on which the event described in Section
                  11(a)(ii) shall have occurred. Following the occurrence of the
                  event described in Section 11(a)(ii), the Board of Directors
                  may suspend the exercisability of the Rights for a period of
                  up to 60 days following the date on which the event described
                  in Section 11(a)(ii) shall have occurred to the extent that
                  the directors have not determined whether to exercise the
                  Company's right of election under this Section 11(a)(iii). In
                  the event of any such suspension, the Company shall issue a
                  public announcement stating that the exercisability of the
                  Rights has been temporarily suspended.

                                       14

<PAGE>   18




                  (b) In case the Company shall fix a record date for the
         issuance of rights, options or warrants to all holders of Preferred
         Shares entitling them (for a period expiring within 45 calendar days
         after such record date) to subscribe for or purchase Preferred Shares
         (or shares having the same rights, privileges and preferences as the
         Preferred Shares ("equivalent preferred shares")) or securities
         convertible into Preferred Shares or equivalent preferred shares at a
         price per Preferred Share or equivalent preferred share (or having a
         conversion price per share, if a security convertible into Preferred
         Shares or equivalent preferred shares) less than the then current per
         share market price of the Preferred Shares (as defined in Section
         11(d)) on such record date, the Purchase Price to be in effect after
         such record date shall be determined by multiplying the Purchase Price
         in effect immediately prior to such record date by a fraction, the
         numerator of which shall be the number of Preferred Shares outstanding
         on such record date plus the number of Preferred Shares which could be
         purchased at the current per share market price for the aggregate
         offering price of the total number of Preferred Shares and/or
         equivalent preferred shares so to be offered (and/or the aggregate
         initial conversion price of the convertible securities so to be
         offered) and the denominator of which shall be the number of Preferred
         Shares outstanding on such record date plus the number of additional
         Preferred Shares and/or equivalent preferred shares to be offered for
         subscription or purchase (or into which the convertible securities so
         to be offered are initially convertible); provided, however, that in no
         event shall the consideration to be paid upon the exercise of one Right
         be less than the aggregate par value of the shares of capital stock of
         the Company issuable upon exercise of one Right. In case such
         subscription price may be paid in a consideration part or all of which
         shall be in a form other than cash, the value of such consideration
         shall be as determined in good faith by the Board of Directors of the
         Company, whose determination shall be described in a statement filed
         with the Rights Agent. Preferred Shares owned by or held for the
         account of the Company shall not be deemed outstanding for the purpose
         of any such computation. Such adjustment shall be made successively
         whenever such a record date is fixed; and in the event that such
         rights, options or warrants are not so issued, the Purchase Price shall
         be adjusted to be the Purchase Price which would then be in effect if
         such record date had not been fixed.

                  (c) In case the Company shall fix a record date for the making
         of a distribution to all holders of the Preferred Shares (including any
         such distribution made in connection with a consolidation or merger in
         which the Company is the continuing or surviving corporation) of
         evidences of indebtedness or assets (other than a regular quarterly
         cash dividend or a dividend payable in Preferred Shares) or
         subscription rights or warrants (excluding those referred to in Section
         11(b) hereof), the Purchase Price to be in effect after such record
         date shall be determined by multiplying the Purchase Price in effect
         immediately prior to such record date by a fraction, the numerator of
         which shall be the then current per share market price of the Preferred
         Shares on such record date, less the fair market value (as determined
         in good faith by the Board of Directors of the Company, whose
         determination shall be described in a statement filed with the Rights
         Agent) of the portion of the assets or evidences of indebtedness so to
         be

                                       15

<PAGE>   19



         distributed or of such subscription rights or warrants applicable to
         one Preferred Share and the denominator of which shall be such current
         per share market price of the Preferred Shares; provided, however, that
         in no event shall the consideration to be paid upon the exercise of one
         Right be less than the aggregate par value of the shares of capital
         stock of the Company to be issued upon exercise of one Right. Such
         adjustments shall be made successively whenever such a record date is
         fixed; and in the event that such distribution is not so made, the
         Purchase Price shall again be adjusted to be the Purchase Price which
         would then be in effect if such record date had not been fixed.

                  (d) (i) For the purpose of any computation hereunder, the
         "current per share market price" of any security (a "Security" for the
         purpose of this Section 11(d)(i)) on any date shall be deemed to be the
         average of the daily closing prices (determined as provided in the next
         sentence) per share of such Security for the 30 consecutive Trading
         Days (as such term is hereinafter defined) immediately prior to such
         date, and for the purpose of any computation under Section 11(a)(iii)
         hereof, the "current per share market price" of a Security on any date
         shall be deemed to be the average of the daily closing prices per share
         of such Security for the 30 consecutive Trading Days immediately
         following such date; provided, however, that in the event that the
         current per share market price of the Security is determined during a
         period following the announcement by the issuer of such Security of (A)
         a dividend or distribution on such Security payable in shares of such
         Security or securities convertible into such shares (other than the
         Rights), or (B) any subdivision, combination or reclassification of
         such Security and prior to the expiration of 30 Trading Days after the
         ex-dividend date for such dividend or distribution, or the record date
         for such subdivision, combination or reclassification, then, and in
         each such case, the current per share market price shall be
         appropriately adjusted to reflect the current market price per share
         equivalent of such Security as if such dividend, distribution,
         combination or reclassification has not been declared. The closing
         price for each day shall be the last sale price, regular way, or, in
         case no such sale takes place on such day, the average of the closing
         bid and asked prices, regular way, in either case as reported in the
         principal consolidated transaction reporting system with respect to
         securities listed on the Nasdaq National Market or, if the Security is
         listed or admitted for trading on a national exchange, as reported in
         the principal consolidated transaction reporting system with respect to
         securities listed on the principal national securities exchange on
         which the Security is listed or admitted to trading, or, if the
         Security is not listed on the Nasdaq National Market or listed or
         admitted to trading on any national securities exchange, the last
         quoted price or, if not so quoted, the average of the high bid and low
         asked prices in the over-the-counter market, as reported by any other
         system then in use, or, if on any such date the Security is not quoted
         by any such organization, the average of the closing bid and asked
         prices as furnished by a professional market maker making a market in
         the Security selected by the Board of Directors of the Company. The
         term "Trading Day" shall mean a day on which the principal national
         securities exchange on which the Security is listed or admitted to
         trading is open for the transaction of business or, if the Security is
         not listed or admitted to trading on any national securities exchange,
         a Business Day.

                                       16

<PAGE>   20




                           (ii) For the purpose of any computation hereunder,
         the "current per share market price" of the Preferred Shares shall be
         determined in accordance with the method set forth in Section 11(d)(i).
         If the Preferred Shares are not publicly traded, the "current per share
         market price" of the Preferred Shares shall be conclusively deemed to
         be the current per share market price of the Common Shares as
         determined pursuant to Section 11(d)(i) (appropriately adjusted to
         reflect any stock split, stock dividend or similar transaction
         occurring after the date hereof), multiplied by one hundred. If neither
         the Common Shares nor the Preferred Shares are publicly held or so
         listed or traded, "current per share market price" shall mean the fair
         value per share as determined in good faith by the Board of Directors
         of the Company, whose determination shall be described in a statement
         filed with the Rights Agent.

                  (e) No adjustment in the Purchase Price shall be required
         unless such adjustment would require an increase or decrease of at
         least 1% in the Purchase Price; provided, however, that any adjustments
         which by reason of this Section 11(e) are not required to be made shall
         be carried forward and taken into account in any subsequent adjustment.
         All calculations under this Section 11 shall be made to the nearest
         cent or to the nearest one one-millionth of a Preferred Share or one
         ten-thousandth of any other share or security, as the case may be.
         Notwithstanding the first sentence of this Section 11(e), any
         adjustment required by this Section 11 shall be made no later than the
         earlier of (i) three years from the date of the transaction which
         requires such adjustment or (ii) the date of the expiration of the
         right to exercise any Rights.

                  (f) If as a result of an adjustment made pursuant to Section
         11(a) hereof, the holder of any Right thereafter exercised shall become
         entitled to receive any shares of capital stock of the Company other
         than Preferred Shares, thereafter the number of such other shares so
         receivable upon exercise of any Right shall be subject to adjustment
         from time to time in a manner and on terms as nearly equivalent as
         practicable to the provisions with respect to the Preferred Shares
         contained in Sections 11(a), 11(b) and 11(c), and the provisions of
         Sections 7, 9, 10, 13 and 14 with respect to the Preferred Shares shall
         apply on like terms to any such other shares.

                  (g) All Rights originally issued by the Company subsequent to
         any adjustment made to the Purchase Price hereunder shall evidence the
         right to purchase, at the adjusted Purchase Price, the number of one
         one-hundredths of a Preferred Share purchasable from time to time
         hereunder upon exercise of the Rights all subject to further adjustment
         as provided herein.

                  (h) Unless the Company shall have exercised its election as
         provided in Section 11(i), upon each adjustment of the Purchase Price
         as a result of the calculations made in Sections 11(b) and 11(c), each
         Right outstanding immediately prior to the making of such adjustment
         shall thereafter evidence the right to purchase, at the adjusted
         Purchase Price, that number of one one-hundredths of a Preferred Share
         (calculated to the nearest one one-millionth of a Preferred Share)
         obtained by (i) multiplying (x) the number of

                                       17

<PAGE>   21



         one one-hundredths of a share covered by a Right immediately prior to
         this adjustment by (y) the Purchase Price in effect immediately prior
         to such adjustment of the Purchase Price and (ii) dividing the product
         so obtained by the Purchase Price in effect immediately after such
         adjustment of the Purchase Price.

                  (i) The Company may elect on or after the date of any
         adjustment of the Purchase Price to adjust the number of Rights, in
         substitution for any adjustment in the number of one one-hundredths of
         a Preferred Share purchasable upon the exercise of a Right. Each of the
         Rights outstanding after such adjustment of the number of Rights shall
         be exercisable for the number of one one-hundredths of a Preferred
         Share for which a Right was exercisable immediately prior to such
         adjustment. Each Right held of record prior to such adjustment of the
         number of Rights shall become that number of Rights (calculated to the
         nearest one ten-thousandth) obtained by dividing the Purchase Price in
         effect immediately prior to adjustment of the purchase Price by the
         Purchase Price in effect immediately after adjustment of the Purchase
         Price. The Company shall make a public announcement of its election to
         adjust the number of Rights, indicating the record date for the
         adjustment, and, if known at the time, the amount of the adjustment to
         be made. This record date may be the date on which the Purchase Price
         is adjusted or any day thereafter, but, if the Rights Certificates have
         been issued, shall be at least 10 days later than the date of the
         public announcement. If Rights Certificates have been issued, upon each
         adjustment of the number of Rights pursuant to this Section 11(i), the
         Company shall, as promptly as practicable, cause to be distributed to
         holders of record of Rights Certificates on such record date Rights
         Certificates evidencing, subject to Section 14 hereof, the additional
         Rights to which such holders shall be entitled as a result of such
         adjustment, or, at the option of the Company, shall cause to be
         distributed to such holders of record in substitution and replacement
         for the Rights Certificates held by such holders prior to the date of
         adjustment, and upon surrender thereof, if required by the Company, new
         Rights Certificates evidencing all the Rights to which such holders
         shall be entitled after such adjustment. Rights Certificates so to be
         distributed shall be issued, executed and countersigned in the manner
         provided for herein and shall be registered in the names of the holders
         of record of Rights Certificates on the record date specified in the
         public announcement.

                  (j) Irrespective of any adjustment or change in the Purchase
         Price or the number of one one-hundredths of a Preferred Share issuable
         upon the exercise of the Rights, the Rights Certificates theretofore
         and thereafter issued may continue to express the Purchase Price and
         the number of one one-hundredths of a Preferred Share which were
         expressed in the initial Rights Certificates issued hereunder, without
         prejudice to the validity of such Rights Certificate(s) or the
         application of the provisions hereof.

                  (k) Before taking any action that would cause an adjustment
         reducing the Purchase Price below one one-hundredth of the then par
         value, if any, of the Preferred Shares issuable upon exercise of the
         Rights, the Company shall take any corporate action which may, in the
         opinion of its counsel, be necessary in order that the Company may

                                       18

<PAGE>   22



         validly and legally issue fully paid and nonassessable Preferred Shares
         at such adjusted Purchase Price.

                  (l) In any case in which this Section 11 shall require that an
         adjustment in the Purchase Price be made effective as of a record date
         for a specified event, the Company may elect to defer until the
         occurrence of such event the issuing to the holder of any Right
         exercised after such record date of the Preferred Shares and other
         capital stock or securities of the Company, if any, issuable upon such
         exercise over and above the Preferred Shares and other capital stock or
         securities of the Company, if any, issuable upon such exercise on the
         basis of the Purchase Price in effect prior to such adjustment;
         provided, however, that the Company shall deliver to such holder a due
         bill or other appropriate instrument evidencing such holder's right to
         receive such additional shares upon the occurrence of the event
         requiring such adjustment.

                  (m) Anything in this Section 11 to the contrary
         notwithstanding, the Company shall be entitled to make such reductions
         in the Purchase Price, in addition to those adjustments expressly
         required by this Section 11, as and to the extent that it in its sole
         discretion shall determine to be advisable in order that any
         consolidation or subdivision of the Preferred Shares, issuance wholly
         for cash of any Preferred Shares at less than the current market price,
         issuance wholly for cash of Preferred Shares or securities which by
         their terms are convertible into or exchangeable for Preferred Shares,
         dividends on Preferred Shares payable in Preferred Shares or issuance
         of rights, options or warrants referred to in Section 11(b), hereafter
         made by the Company to holders of its Preferred Shares shall not be
         taxable to such stockholders.

                  (n) In the event that at any time after the date of this
         Agreement and prior to the Shares Acquisition Date, the Company shall
         (i) declare or pay any dividend on the Common Shares payable in Common
         Shares or (ii) effect a subdivision, combination or consolidation of
         the Common Shares (by reclassification or otherwise than by payment of
         dividends in Common Shares) into a greater or lesser number of Common
         Shares, then in any such case (i) the number of one one-hundredths of a
         Preferred Share purchasable after such event upon proper exercise of
         each Right shall be determined by multiplying the number of one
         one-hundredths of a Preferred Share so purchasable immediately prior to
         such event by a fraction, the numerator of which is the number of
         Common Shares outstanding immediately before such event and the
         denominator of which is the number of Common Shares outstanding
         immediately after such event, and (ii) each Common Share outstanding
         immediately after such event shall have issued with respect to it that
         number of Rights which each Common Share outstanding immediately prior
         to such event had issued with respect to it. The adjustments provided
         for in this Section 11(n) shall be made successively whenever such a
         dividend is declared or paid or such a subdivision, combination or
         consolidation is effected.

         Section 12. Certificate of Adjusted Purchase Price or Number of 
Shares.  Whenever an adjustment is made as provided in Section 11 and 13 
hereof, the Company shall promptly (a)

                                       19

<PAGE>   23



prepare a certificate setting forth such adjustment, and a brief statement of
the facts accounting for such adjustment, (b) file with the Rights Agent and
with each transfer agent for the Common Shares or the Preferred Shares a copy of
such certificate and (c) mail a brief summary thereof to each holder of a Rights
Certificate in accordance with Section 25 hereof. The Rights Agent shall be
fully protected in relying on any such certificate and on any adjustment therein
contained, and shall not be obligated or responsible for calculating any
adjustment, nor shall it be deemed to have knowledge of such an adjustment
unless and until it shall have received such certificate.

         Section 13. Consolidation, Merger or Sale or Transfer of Assets or 
Earning Power.

                  (a) If, after the Shares Acquisition Date, directly or
         indirectly, (w) the Company shall consolidate with, or merge with and
         into, any other Person, (x) any Person shall consolidate with the
         Company, or merge with and into the Company and the Company shall be
         the continuing or surviving corporation of such merger and, in
         connection with such merger or consolidation all or part of the
         outstanding Common Shares are changed into or exchanged for stock or
         other securities of any other Person (or the Company) or cash or any
         other property, (y) the Company shall sell, mortgage or otherwise
         transfer (or one or more of its Subsidiaries shall sell, mortgage or
         otherwise transfer), in one or more transactions, assets or earning
         power aggregating 50% or more of the assets or earning power of the
         Company and its Subsidiaries (taken as a whole) to any Person other
         than the Company or one or more of its wholly-owned Subsidiaries, or
         (z) any Acquiring Person or any Associate or Affiliate of any such
         Acquiring Person, at any time after the date of this Agreement,
         directly or indirectly, (A) shall, in one transaction or a series of
         transactions, transfer any assets to the Company or to any of its
         Subsidiaries in exchange (in whole or in part) for Common Shares, for
         shares of other equity securities of the Company or for securities
         exercisable for or convertible into shares of equity securities of the
         Company (Common Shares or otherwise) or otherwise obtain from the
         Company, with or without consideration, any additional shares of such
         equity securities or securities exercisable for or convertible into
         shares of such equity securities (other than pursuant to a pro rata
         distribution to all holders of Common Shares), (B) shall sell,
         purchase, lease, exchange, mortgage, pledge, transfer or otherwise
         acquire or dispose of assets, in one transaction or a series of
         transactions, to, from or with the Company or any of its Subsidiaries
         without obtaining a written opinion from a nationally recognized
         investment banking firm that the terms of such transaction or
         arrangement are no less favorable to the Company than the Company would
         be able to obtain in arm's-length negotiation with an unaffiliated
         third party, (C) shall sell, purchase, lease, exchange, mortgage,
         pledge, transfer or otherwise acquire or dispose of in one transaction
         or a series of transactions, to, from or with the Company or any of the
         Company's Subsidiaries (other than incidental to the lines of business,
         if any, engaged in as of the date hereof between the Company and such
         Acquiring Person or Associate or Affiliate) assets having an aggregate
         fair market value of more than $5,000,000, (D) shall receive any
         compensation from the Company or any of the Company's Subsidiaries
         other than compensation for full-time employment as a regular

                                       20

<PAGE>   24



         employee at rates in accordance with the Company's (or its
         Subsidiaries') past practices, or (E) shall receive the benefit,
         directly or indirectly (except proportionately as a stockholder and
         except if resulting from a requirement of law or governmental
         regulation), of any loans, advances, guarantees, pledges or other
         financial assistance or any tax credits or other tax advantage provided
         by the Company or any of its Subsidiaries, then, and in each such case,
         (i) each holder of a Right (except as otherwise provided herein) shall
         thereafter have the right to receive, upon the exercise thereof at a
         price equal to the then current Purchase Price multiplied by the number
         of one one-hundredths of a Preferred Share for which a Right is then
         exercisable in accordance with the terms of this Agreement, and in lieu
         of Preferred Shares, such number of validly authorized and issued,
         fully paid, non-assessable and freely tradeable Common Shares of the
         Principal Party (as hereinafter defined) not subject to any liens,
         encumbrances, rights of first refusal or other adverse claims, as shall
         equal the result obtained by (A) multiplying the then current Purchase
         Price by the number of one one-hundredths of a Preferred Share for
         which a Right is then exercisable and dividing that product by (B) 50%
         of the then current per share market price of the Common Shares of the
         Principal Party (determined pursuant to Section 11(d) hereof) on the
         date of consummation of such consolidation, merger, sale or transfer;
         (ii) such Principal Party shall thereafter be liable for, and shall
         assume, by virtue of such consolidation, merger, sale or transfer, all
         the obligations and duties of the Company pursuant to this Agreement;
         (iii) the term "Company" shall thereafter be deemed to refer to such
         Principal Party; and (iv) such Principal Party shall take such steps
         (including, but not limited to, the reservation of a sufficient number
         of its Common Shares in accordance with Section 9 hereof) in connection
         with such consummation as may be necessary to assure that the
         provisions hereof shall thereafter be applicable, as nearly as
         reasonably may be, in relation to the Common Shares thereafter
         deliverable upon the exercise of the Rights.

                  (b)      "Principal Party" shall mean:

                           (i) In the case of any transaction described in (w)
                  or (x) of the first sentence of Section 13(a), the Person that
                  is the issuer of any securities into which Common Shares of
                  the Company are converted in such merger or consolidation, and
                  if no securities are so issued, the Person that is the
                  surviving entity of such merger or consolidation (including
                  the Company if applicable); and

                           (ii) in the case of any transaction described in (y)
                  or (z) of the first sentence in Section 13(a), the Person that
                  is the party receiving the greatest portion of the assets,
                  securities, earning power or other benefit transferred
                  pursuant to such transaction or transactions;

         provided, however, that in any such case described in clauses (b)(i)
         and (b)(ii): (1) if the Common Shares of such Person are not at such
         time and have not been continuously over the preceding 12-month period
         registered under Section 12 of the Exchange Act,

                                       21

<PAGE>   25



         and such Person is a direct or indirect Subsidiary of another Person
         the Common Shares of which are and have been so registered, "Principal
         Party" shall refer to such other Person; (2) in case such Person is a
         Subsidiary, directly or indirectly, of more than one person, the Common
         Shares of two or more of which are and have been so registered,
         "Principal Party" shall refer to whichever of such Persons is the
         issuer of the Common Shares having the greatest aggregate market value;
         and (3) in case such Person is owned, directly or indirectly, by a
         joint venture formed by two or more Persons that are not owned,
         directly or indirectly, by the same person, the rules set forth in (1)
         and (2) above shall apply to each of the chains of ownership having an
         interest in such joint venture as if such party were a "Subsidiary" of
         both or all of such joint venturers and the Principal Parties in each
         such chain shall bear the obligations set forth in this Section 13 in
         the same ratio as their direct or indirect interests in such Person
         bear to the total of such interests.

                  (c) The Company shall not consummate any such consolidation,
         merger, sale or transfer unless the Principal Party shall have
         sufficient Common Shares authorized to permit the full exercise of the
         Rights and prior thereto the Company and such Principal Party shall
         have executed and delivered to the Rights Agent a supplemental
         agreement providing for the terms set forth in paragraphs (a) and (b)
         of this Section 13 and further providing that, as soon as practicable
         after the date of any consolidation, merger, sale or transfer mentioned
         in paragraph (a) of this Section 13, the Principal Party will:

                           (i) prepare and file a registration statement under
                  the Act, with respect to the Rights and the securities
                  purchasable upon exercise of the Rights on an appropriate
                  form, and will use its best efforts to cause such registration
                  statement to (A) become effective as soon as practicable after
                  such filing and (B) remain effective (with a prospectus at all
                  times meeting the requirements of the Act) until the Final
                  Expiration Date;

                           (ii) deliver to holders of the Rights historical
                  financial statements for the Principal Party and each of its
                  Affiliates which comply in all respects with the requirements
                  for registration on Form 10 under the Exchange Act; and

                           (iii) take such actions as may be necessary or
                  appropriate under the blue sky laws of the various states.

                  The Company shall not enter into any transaction of the kind
         referred to in this Section 13 if at the time of such transaction there
         are any rights, warrants, instruments or securities outstanding or any
         agreements or arrangements which, as a result of the consummation of
         such transaction, would eliminate or substantially diminish the
         benefits intended to be afforded by the Rights. The provisions of this
         Section 13 shall similarly apply to successive mergers, consolidations,
         sales or transfers.



                                       22

<PAGE>   26



         Section 14. Fractional Rights and Fractional Shares.

                  (a) The Company shall not be required to issue fractions of
         Rights or to distribute Rights Certificates which evidence fractional
         Rights. In lieu of such fractional Rights, there shall be paid to the
         registered holders of the Rights Certificates with regard to which such
         fractional Rights would otherwise be issuable, an amount in cash equal
         to the same fraction of the current market value of a whole Right. For
         the purposes of this Section 14(a), the current market value of a whole
         Right shall be the closing price of the Rights for the Trading Day
         immediately prior to the date on which such fractional Rights would
         have been otherwise issuable. The closing price for any day shall be
         the last sale price, regular way, or, in case no such sale takes place
         on such day, the average of the closing bid and asked prices, regular
         way, in either case as reported in the principal consolidated
         transaction reporting system with respect to securities listed or
         admitted to trading on the principal national securities exchange on
         which the Rights are listed or admitted to trading or, if the Rights
         are not listed or admitted to trading on any national securities
         exchange, the last quoted price or, if not so quoted, the average of
         the high bid and low asked prices in the over-the-counter market, as
         reported by Nasdaq or such other system then in use, or, if on any such
         date the Rights are not quoted by any such organization, the average of
         the closing bid and asked prices as furnished by a professional market
         maker making a market in the Rights selected by the Board of Directors
         of the Company. If on any such date no such market maker is making a
         market in the Rights, the fair value of the Rights on such date as
         determined in good faith by the Board of Directors of the Company shall
         be used.

                  (b) The Company shall not be required to issue fractions of
         Preferred Shares (other than fractions which are integral multiples of
         one one-hundredth of a Preferred Share) upon exercise of the Rights or
         to distribute certificates which evidence fractional Preferred Shares
         (other than fractions which are integral multiples of one one-hundredth
         of a Preferred Share). Fractions of Preferred Shares in integral
         multiples of one one-hundredth of a Preferred Share may, at the
         election of the Company, be evidenced by depositary receipts, pursuant
         to an appropriate agreement between the Company and a depositary
         selected by it; provided, that such agreement shall provide that the
         holders of such depositary receipts shall have all the rights,
         privileges and preferences to which they are entitled as beneficial
         owners of the Preferred Shares represented by such depositary receipts.
         In lieu of fractional Preferred Shares that are not integral multiples
         of one one-hundredth of a Preferred Share, the Company shall pay to the
         registered holders of Rights Certificates at the time such Rights are
         exercised as herein provided an amount in cash equal to the same
         fraction of the current market value of one Preferred Share. For the
         purposes of this Section 14(b), the current market value of a Preferred
         Share shall be the closing price of a Preferred Share (as determined
         pursuant to the second sentence of Section 11(d)(i) hereof) for the
         Trading Day immediately prior to the date of such exercise.


                                       23

<PAGE>   27



                  (c) Following the occurrence of a Distribution Date, the
         Company shall not be required to issue fractions of shares of Common
         Stock upon exercise of the Rights or to distribute certificates which
         evidence fractional shares of Common Stock. In lieu of fractional
         shares of Common Stock, the Company may pay to the registered holders
         of Rights Certificates at the time such Rights are exercised as herein
         provided an amount in cash equal to the same fraction of the current
         market value of one share of Common Stock. For purposes of this Section
         14(c), the current market value of one share of Common Stock shall be
         the closing price of one share of Common Stock (as determined pursuant
         to the second sentence of Section 11(d)(i) hereof) for the Trading Day
         immediately prior to the date of such exercise.

                  (d) The holder of a Right by the acceptance of the Right
         expressly waives his right to receive any fractional Rights or any
         fractional shares upon exercise of a Right (except as provided above).

         Section 15. Rights of Action. All rights of action in respect of this
Agreement, excepting the rights of action given to the Rights Agent under
Section 18 hereof, are vested in the respective registered holders of the Rights
Certificates (and, prior to the Distribution Date, the registered holders of the
Common Shares); and any registered holder of any Rights Certificate (or, prior
to the Distribution Date, of the Common Shares), without the consent of the
Rights Agent or of the holder of any other Rights Certificate (or, prior to the
Distribution Date, of the Common Shares), may, in his own behalf and for his own
benefit, enforce, and may institute and maintain any suit, action or proceeding
against the Company to enforce, or otherwise act in respect of, his right to
exercise the Rights evidenced by such Rights Certificate in the manner provided
in such Rights Certificate and in this Agreement. Without limiting the foregoing
or any remedies available to the holders of Rights, it is specifically
acknowledged that the holders of Rights would not have an adequate remedy at law
for any breach of this Agreement and will be entitled to specific performance of
the obligations under, and injunctive relief against actual or threatened
violations of the obligations of any Person subject to, this Agreement.

         Section 16. Agreement of Rights Holders.  Every holder of a Right, by 
accepting the same, consents and agrees with the Company and the Rights Agent 
and with every other holder of a Right that:

                  (a) prior to the Distribution Date, the Rights will be 
         transferable only in connection with the transfer of the Common Shares;

                  (b) after the Distribution Date, the Rights Certificates will
         be transferable only on the registry books of the Rights Agent if
         surrendered at the principal office of the Rights Agent, duly endorsed
         or accompanied by a proper instrument of transfer and with appropriate
         forms and certificates fully executed;


                                       24

<PAGE>   28



                  (c) the Company and the Rights Agent may deem and treat the
         Person in whose name the Rights Certificate (or, prior to the
         Distribution Date, the associated certificate for Common Shares) is
         registered as the absolute owner thereof and of the Rights evidenced
         thereby (notwithstanding any notations of ownership or writing on the
         Rights Certificates or the associated certificate for Common Shares
         made by anyone other than the Company or the Rights Agent) for all
         purposes whatsoever, and neither the Company nor the Rights Agent shall
         be affected by any notice to the contrary; and

                  (d) notwithstanding anything in this Agreement to the
         contrary, neither the Company nor the Rights Agent shall have any
         liability to any holder of a Right or any other Person as a result of
         its inability to perform any of its obligations under this Agreement by
         reason of any preliminary or permanent injunction or other order,
         decree or ruling issued by a court of competent jurisdiction or by a
         governmental, regulatory or administrative agency or commission, or any
         statute, rule, regulation or executive order promulgated or enacted by
         any governmental authority prohibiting or otherwise restraining
         performance of such obligation.

         Section 17. Rights Certificate Holder Not Deemed a Stockholder. No
holder, as such, of any Rights Certificate shall be entitled to vote, receive
dividends or be deemed for any purpose the holder of the Preferred Shares or any
other securities of the Company which may at any time be issuable on the
exercise of the Rights represented thereby, nor shall anything contained herein
or in any Rights Certificate be construed to confer upon the holder of any
Rights Certificate, as such, any of the rights of a stockholder of the Company
or any right to vote for the election of directors or upon any matter submitted
to stockholders at any meeting thereof, or to give or withhold consent to any
corporate action, or to receive notice of meetings or other actions affecting
stockholders (except as provided in Section 25 hereof), or to receive dividends
or subscription rights, or otherwise, until the Right or Rights evidenced by
such Rights Certificate shall have been exercised in accordance with the
provisions hereof.

         Section 18. Concerning the Rights Agent. The Company agrees to pay to
the Rights Agent reasonable compensation for all services rendered by it
hereunder and, from time to time, on demand of the Rights Agent, its reasonable
expenses and counsel fees and other disbursements incurred in the administration
and execution of this Agreement and the exercise and performance of its duties
hereunder. The Company also agrees to indemnify the Rights Agent for, and to
hold it harmless against, any loss, liability, or expense, incurred without
negligence, bad faith or willful misconduct on the part of the Rights Agent, for
anything done or omitted by the Rights Agent in connection with the acceptance
and administration of this Agreement, including the costs and expenses of
defending against any claim of liability arising, directly or indirectly,
therefrom. In no case shall the Rights Agent be liable for special, indirect,
incidental or consequential loss or damage of any kind whatsoever (including but
not limited to lost profits), even if the Rights Agent has been advised of the
possibility of such loss or damage. The indemnity provided for herein shall
survive the expiration of the Rights, the termination of this Agreement, and the
resignation or removal of the Rights Agent. The costs and expenses of enforcing
this right of indemnification shall also be paid by the Company.

                                       25

<PAGE>   29




         The Rights Agent may conclusively rely upon and shall be protected and
shall incur no liability for, or in respect of any action taken, suffered or
omitted by it in connection with, its administration of this Agreement in
reliance upon any Rights Certificate or certificate for the Preferred Shares or
Common Shares or for other securities of the Company, instrument of assignment
or transfer, power of attorney, endorsement, affidavit, letter, notice,
direction, consent, certificate, statement, or other paper or document believed
by it to be genuine and to be signed, executed and, where necessary, verified or
acknowledged, by the proper Person or Persons, or otherwise upon the advice of
counsel as set forth in Section 20 hereof.

         Section 19. Merger or Consolidation or Change of Name of Rights Agent.
Any corporation into which the Rights Agent or any successor Rights Agent may be
merged or with which it may be consolidated, or any corporation resulting from
any merger or consolidation to which the Rights Agent or any successor Rights
Agent shall be a party, or any corporation succeeding to the stock transfer or
corporate trust business of the Rights Agent or any successor Rights Agent,
shall be the successor to the Rights Agent under this Agreement without the
execution or filing of any paper or any further act on the part of any of the
parties hereto, provided that such corporation would be eligible for appointment
as a successor Rights Agent under the provisions of Section 21 hereof. In case
at the time such successor Rights Agent shall succeed to the agency created by
this Agreement any of the Rights Certificates shall have been countersigned but
not delivered, any such successor Rights Agent may adopt the countersignature of
the predecessor Rights Agent and deliver such Rights Certificates so
countersigned; and in case at that time any of the Rights Certificates shall not
have been countersigned, any successor Rights Agent may countersign such Rights
Certificates either in the name of the predecessor Rights Agent or in the name
of the successor Rights Agent; and in all such cases such Rights Certificates
shall have the full force provided in the Rights Certificates and in this
Agreement.

         In case at any time the name of the Rights Agent shall be changed and
at such time any of the Rights Certificates shall have been countersigned but
not delivered, the Rights Agent may adopt the countersignature under its prior
name and deliver Rights Certificates so countersigned; and in case at that time
any of the Rights Certificates shall not have been countersigned, the Rights
Agent may countersign such Rights Certificates either in its prior name or in
its changed name; and in all such cases such Rights Certificates shall have the
full force provided in the Rights Certificates and in this Agreement.

         Section 20. Duties of Rights Agent. The Rights Agent undertakes the
duties and obligations imposed by this Agreement upon the following terms and
conditions, and no implied duties or obligations shall be read into this
Agreement against the Rights Agent, by all of which the Company and the holders
of Rights Certificates, by their acceptance thereof, shall be bound:

                  (a) Before the Rights Agent acts or refrains from acting, the
         Rights Agent may consult with legal counsel (who may be legal counsel
         for the Company), and the opinion of such counsel shall be full and
         complete authorization and protection to the Rights Agent as to any
         action taken or omitted by it in good faith and in accordance with such
         opinion.

                                       26

<PAGE>   30




                  (b) Whenever in the performance of its duties under this
         Agreement the Rights Agent shall deem it necessary or desirable that
         any fact or matter be proved or established by the Company prior to
         taking or suffering any action hereunder, such fact or matter (unless
         other evidence in respect thereof be herein specifically prescribed)
         may be deemed to be conclusively proved and established by a
         certificate signed by any one of the Chairman of the Board, the Chief
         Executive Officer, the President, any Vice President, the Treasurer or
         the Secretary of the Company and delivered to the Rights Agent; and
         such certificate shall be full authorization to the Rights Agent for
         any action taken or suffered in good faith by it under the provisions
         of this Agreement in reliance upon such certificate.

                  (c) The Rights Agent shall be liable hereunder to the Company
         and any other Person only for its own negligence, bad faith or willful
         misconduct.

                  (d) The Rights Agent shall not be liable for or by reason of
         any of the statements of fact or recitals contained in this Agreement
         or in the Rights Certificates (except its countersignature thereof) or
         be required to verify the same, but all such statements and recitals
         are and shall be deemed to have been made by the Company only.

                  (e) The Rights Agent shall not be under any responsibility in
         respect of the validity of this Agreement or the execution and delivery
         hereof (except the due execution hereof by the Rights Agent) or in
         respect of the validity or execution of any Rights Certificate (except
         its countersignature thereof); nor shall it be responsible for any
         breach by the Company of any covenant or condition contained in this
         Agreement or in any Rights Certificate; nor shall it be responsible for
         any change in the exercisability of the Rights (including the Rights
         becoming void pursuant to Section 11(a)(ii) hereof) or any adjustment
         in the terms of the Rights (including the manner, method or amount
         thereof) provided for in Section 3, 11, 13, 23 or 24, or the
         ascertaining of the existence of facts that would require any such
         change or adjustment (except with respect to the exercise of Rights
         evidenced by Rights Certificates after actual notice that such change
         or adjustment is required); nor shall it by any act hereunder be deemed
         to make any representation or warranty as to the authorization or
         reservation of any Preferred Shares (or Common Shares and/or other
         securities, as the case may be) to be issued pursuant to this agreement
         or any Rights Certificate or as to whether any Preferred Shares (or
         Common Shares and/or other securities, as the case may be) will, when
         issued, be validly authorized and issued, fully paid and nonassessable.

                  (f) The Company agrees that it will perform, execute,
         acknowledge and deliver or cause to be performed, executed,
         acknowledged and delivered all such further and other acts, instruments
         and assurances as may reasonably be required by the Rights Agent for
         the carrying out or performing by the Rights Agent of the provisions of
         this Agreement.


                                       27

<PAGE>   31



                  (g) The Rights Agent is hereby authorized and directed to
         accept, prior to the Shares Acquisition Date, instructions with respect
         to the performance of its duties hereunder from any one of the Chairman
         of the Board, the Chief Executive Officer, the President, any Vice
         President, the Secretary or the Treasurer of the Company, and to apply
         to such officers for advice or instructions in connection with its
         duties, and it shall not be liable for any action taken or suffered by
         it in good faith in accordance with instructions of any such officer or
         for any delay in acting while waiting for those instructions. Any
         application by the Rights Agent for written instructions from the
         Company may, at the option of the Rights Agent, set forth in writing
         any action proposed to be taken or omitted by the Rights Agent under
         this Rights Agreement and the date on or after which such action shall
         be taken or such omission shall be effective. The Rights Agent shall
         not be liable for any action taken by, or omission of, the Rights Agent
         in accordance with a proposal included in any such application on or
         after the date specified in such application (which date shall not be
         less than ten Business Days after the date any officer of the Company
         actually receives such application, unless any such officer shall have
         consented in writing to an earlier date) unless, prior to taking any
         such action (or the effective date in the case of an omission), the
         Rights Agent shall have received written instructions in response to
         such application subject to the proposed action or omission and/or
         specifying the action to be taken or omitted.

                  (h) The Rights Agent and any stockholder, director, officer or
         employee of the Rights Agent may buy, sell or deal in any of the Rights
         or other securities of the Company, or become pecuniarily interested in
         any transaction in which the Company may be interested, or contract
         with or lend money to the Company or otherwise act as fully and freely
         as though it were not Rights Agent under this Agreement. Nothing herein
         shall preclude the Rights Agent from acting in any other capacity for
         the Company or for any other legal entity.

                  (i) The Rights Agent may execute and exercise any of the
         rights or powers hereby vested in it or perform any duty hereunder
         either itself or by or through its attorneys or agents, and the Rights
         Agent shall not be answerable or accountable for any act, default,
         neglect or misconduct of any such attorneys or agents or for any loss
         to the Company resulting from any such act, default, neglect or
         misconduct, provided reasonable care was exercised in the selection and
         continued employment thereof.

                  (j) No provision of this Agreement shall require the Rights
         Agent to expend or risk its own funds or otherwise incur any financial
         liability in the performance of any of its duties hereunder or in the
         exercise of its rights if there shall be reasonable grounds for
         believing that repayment of such funds or adequate indemnification
         against such risk or liability is not reasonably assured to it.

                  (k) The Rights Agent shall not be required to take notice or
         be deemed to have notice of any fact, event or determination
         (including, without limitation any dates or events defined in this
         Agreement or the designation of any Person as an Acquiring

                                       28

<PAGE>   32



         Person, Affiliate or Associate) under this Agreement unless and until
         the Rights Agent shall be specifically notified in writing by the
         Company of such fact, event or determination.

         Section 21. Change of Rights Agent. The Rights Agent or any successor
Rights Agent may resign and thereafter be discharged from its duties under this
Agreement upon 30 days' notice in writing mailed to the Company and to each
transfer agent of the Common Shares or Preferred Shares by registered or
certified mail, and, at the expense of the Company, to the holders of the Rights
Certificates by first-class mail. The Company may remove the Rights Agent or any
successor Rights Agent upon 30 days' notice in writing, mailed to the Rights
Agent or successor Rights Agent, as the case may be, and to each transfer agent
of the Common Shares or Preferred Shares by registered or certified mail, and to
the holders of the Rights Certificates by first-class mail. If the Rights Agent
shall resign or be removed or shall otherwise become incapable of acting, the
Company shall appoint a successor to the Rights Agent. If the Company shall fail
to make such appointment within a period of 30 days after giving notice of such
removal or after it has been notified in writing of such resignation or
incapacity by the resigning or incapacitated Rights Agent or by the holder of a
Rights Certificate (who shall, with such notice, submit his Rights Certificate
for inspection by the Company), then the registered holder of any Rights
Certificate may apply to any court of competent jurisdiction for the appointment
of a new Rights Agent. Any successor Rights Agent, whether appointed by the
Company or by such a court, shall be either (A) a corporation organized and
doing business under the laws of the United States or of any state of the United
States, in good standing, authorized under such laws to exercise corporate trust
or stock transfer powers, and subject to supervision or examination by federal
or state authority and which has at the time of its appointment as Rights Agent
a combined capital and surplus of at least $50 million or (B) an affiliate of
such a corporation. After appointment, the successor Rights Agent shall be
vested with the same powers, rights, duties and responsibilities as if it had
been originally named as Rights Agent without further act or deed; but the
predecessor Rights Agent shall deliver and transfer to the successor Rights
Agent any property at the time held by it hereunder, and execute and deliver any
further assurance, conveyance, act or deed necessary for the purpose. Not later
than the effective date of any such appointment the Company shall file notice
thereof in writing with the predecessor Rights Agent and each transfer agent of
the Common Shares or Preferred Shares, and mail a notice thereof in writing to
the registered holders of the Rights Certificates. Failure to give any notice
provided for in this Section 21, however, or any defect therein, shall not
affect the legality or validity of the resignation or removal of the Rights
Agent or the appointment of the successor Rights Agent, as the case may be.

         Section 22. Issuance of New Rights Certificates. Notwithstanding any of
the provisions of this Agreement or of the Rights to the contrary, the Company
may, at its option, issue new Rights Certificates evidencing Rights in such form
as may be approved by its Board of Directors to reflect any adjustment or change
in the Purchase Price and the number or kind or class of shares or other
securities or property purchasable under the Rights Certificates made in
accordance with the provisions of this Agreement.


                                       29

<PAGE>   33



         Section 23. Redemption.

                  (a) The Rights may be redeemed by action of the Board of
         Directors pursuant to paragraph (b) of this Section 23 and shall not be
         redeemed in any other manner.

                  (b) The Board of Directors of the Company may, at its option,
         at any time prior to such time as any Person becomes an Acquiring
         Person, redeem all, but not less than all, of the then outstanding
         Rights at a redemption price of $.01 per Right, appropriately adjusted
         to reflect any stock split, stock dividend or similar transaction
         occurring after the date hereof (such redemption price being
         hereinafter referred to as the "Redemption Price"). The redemption of
         the Rights by the Board of Directors may be made effective at such time
         on such basis and with such conditions as the Board of Directors in its
         sole discretion may establish. If redemption of the Rights is to be
         effective as of a future date, the Rights shall continue to be
         exercisable, subject to Section 11(a)(ii) hereof, until the effective
         date of the redemption, provided that nothing contained herein shall
         preclude the Board of Directors from subsequently causing the Rights to
         be redeemed at a date earlier than the previously scheduled effective
         date of the redemption. The Company may, at its option, pay the
         Redemption Price in cash, Common Shares (based on the current per share
         market price of the Common Shares at the time of redemption) or any
         other form of consideration deemed appropriate by the Board of
         Directors.

                  (c) Immediately upon the action of the Board of Directors of
         the Company ordering the redemption of the Rights pursuant to paragraph
         (b) of this Section 23 (or at the effective time of such redemption
         established by the Board of Directors of the Company pursuant to
         paragraph (b) of this Section 23), and without any further action and
         without any notice, the right to exercise the Rights will terminate and
         the only right thereafter of the holders of Rights shall be to receive
         the Redemption Price. The Company shall promptly give public notice of
         any such redemption; provided, however, that the failure to give, or
         any defect in, any such notice shall not affect the validity of such
         redemption. Within 10 days after such action of the Board of Directors
         ordering the redemption of the Rights pursuant to paragraph (b) of this
         Section 23 or if later, the effectiveness of the redemption of the
         rights pursuant to the last sentence of paragraph (b), the Company
         shall mail a notice of redemption to all the holders of the then
         outstanding Rights at their last addresses as they appear upon the
         registry books of the Rights Agent or, prior to the Distribution Date,
         on the registry books of the transfer agent for the Common Shares. Any
         notice which is mailed in the manner herein provided shall be deemed
         given, whether or not the holder receives the notice. Each such notice
         of redemption will state the method by which the payment of the
         Redemption Price will be made. The Company may, at its option,
         discharge all of its obligations with respect to the Rights by (i)
         issuing a press release announcing the manner of redemption of the
         Rights, (ii) depositing with a bank or trust company having a capital
         and surplus of at least $100 million, funds necessary for such
         redemption, in trust, to be applied to the redemption of the Rights so
         called for redemption and (iii) arranging for

                                       30

<PAGE>   34



         the mailing of the Redemption Price to the registered holders of the
         Rights; then, and upon such action, all outstanding Rights Certificates
         shall be null and void without further action by the Company. Neither
         the Company nor any of its Affiliates or Associates may redeem, acquire
         or purchase for value any Rights at any time in any manner other than
         that specifically set forth in this Section 23 or in Section 24 hereof,
         and other than in connection with the purchase of Common Shares prior
         to the Shares Acquisition Date.

         Section 24.  Exchange.

                  (a) The Board of Directors of the Company may, at its option,
         at any time after any Person becomes an Acquiring Person, exchange all
         or part of the then outstanding and exercisable Rights (which shall not
         include Rights that have become void pursuant to the provisions of
         Section 11(a)(ii) hereof) for Common Shares at an exchange ratio of one
         Common Share per Right, appropriately adjusted to reflect any stock
         split, stock dividend or similar transaction occurring after the date
         hereof. Notwithstanding the foregoing, the Board of Directors shall not
         be empowered to effect such exchange at any time after any Person
         (other than the Company, any Subsidiary of the Company, any employee
         benefit plan of the Company or any such Subsidiary, or any entity
         holding Common Shares for or pursuant to the terms of any such plan),
         together with all Affiliates and Associates of such Person, becomes the
         Beneficial Owner of 50% or more of the Common Shares then outstanding.

                  (b) Immediately upon the action of the Board of Directors of
         the Company ordering the exchange of any Rights pursuant to subsection
         (a) of this Section 24 and without any further action and without any
         notice, the right to exercise such Rights shall terminate and the only
         right thereafter of a holder of such Rights shall be to receive that
         number of Common Shares equal to the number of valid Rights held by
         such holder. The Company shall promptly give public notice of any such
         exchange; provided, however, that the failure to give, or any defect
         in, such notice shall not affect the validity of such exchange. The
         Company promptly shall mail a notice of any such exchange to all of the
         holders of such Rights at their last addresses as they appear upon the
         registry books of the Rights Agent. Any notice which is mailed in the
         manner herein provided shall be deemed given, whether or not the holder
         receives the notice. Each such notice of exchange will state the method
         by which the exchange of the Common Shares for Rights will be effected
         and, in the event of any partial exchange, the number of Rights which
         will be exchanged. Any partial exchange shall be effected pro rata
         based on the number of Rights (other than Rights which have become void
         pursuant to the provisions of Section 11(a)(ii) hereof) held by each
         holder of Rights.

                  (c) In any exchange pursuant to this Section 24, the Company,
         at its option, may substitute Preferred Shares (or equivalent preferred
         shares, as such term is defined in Section 11(b) hereof) for Common
         Shares exchangeable for Rights, at the initial rate of one
         one-hundredth of a Preferred Share (or equivalent preferred share) for
         each

                                       31

<PAGE>   35



         Common Share, as appropriately adjusted to reflect adjustments in the
         voting rights of the Preferred Shares pursuant to the terms thereof, so
         that the fraction of a Preferred Share delivered in lieu of each Common
         Share shall have the same voting rights as one Common Share.

                  (d) In the event that there shall not be sufficient Common
         Shares or Preferred Shares issued but not outstanding or authorized but
         unissued to permit any exchange of Rights as contemplated in accordance
         with this Section 24, the Company shall take all such action as may be
         necessary to authorize additional Common Shares or Preferred Shares for
         issuance upon exchange of the Rights.

                  (e) The Company shall not be required to issue fractions of
         Common Shares or to distribute certificates which evidence fractional
         Common Shares. In lieu of such fractional Common Shares, the Company
         shall pay to the registered holders of the Rights Certificates with
         regard to which such fractional Common Shares would otherwise be
         issuable an amount in cash equal to the same fraction of the current
         market value of a whole Common Share. For the purposes of this
         paragraph (e), the current market value of a whole Common Share shall
         be the closing price of a Common Share (as determined pursuant to the
         second sentence of Section 11(d)(i) hereof) for the Trading Day
         immediately prior to the date of exchange pursuant to this Section 24.

         Section 25. Notice of Certain Events.

                  (a) In case the Company shall propose (i) to pay any dividend
         payable in stock of any class to the holders of its Preferred Shares or
         to make any other distribution to the holders of its Preferred Shares
         (other than a regular quarterly cash dividend), (ii) to offer to the
         holders of its Preferred Shares rights or warrants to subscribe for or
         to purchase any additional Preferred Shares or shares of stock of any
         class or any other securities, rights or options, (iii) to effect any
         reclassification of its Preferred Shares (other than a reclassification
         involving only the subdivision of outstanding Preferred Shares), (iv)
         to effect any consolidation or merger into or with, or to effect any
         sale or other transfer (or to permit one or more of its Subsidiaries to
         effect any sale or other transfer), in one or more transactions, of 50%
         or more of the assets or earning power of the Company and its
         Subsidiaries (taken as a whole) to, any other Person, (v) to effect the
         liquidation, dissolution or winding up of the Company, or (vi) to
         declare or pay any dividend on the Common Shares payable in Common
         Shares or to effect a subdivision, combination or consolidation of the
         Common Shares (by reclassification or otherwise), then, in each such
         case, the Company shall give to each holder of a Rights Certificate, in
         accordance with Section 26 hereof, a notice of such proposed action,
         which shall specify the record date for such event, and the date of
         participation therein by the holders of the Common Shares and/or
         Preferred Shares, if any such date is to be fixed, and such notice
         shall be so given in the case of any action covered by clause (i) or
         (ii) above at least 10 days prior to the record date for determining
         holders of the Preferred Shares for purposes of such action, and in the
         case of any such other action, at least 10 days prior

                                       32

<PAGE>   36



         to the date of the taking of such proposed action or the date of
         participation therein by the holders of the Common Shares and/or
         Preferred Shares, whichever shall be the earlier.

                  (b) In case any of the events set forth in Section 11(a)(ii)
         hereof shall occur, then the Company shall as soon as practicable
         thereafter give to each holder of a Rights Certificate, in accordance
         with Section 26 hereof, a notice of the occurrence of such event, which
         notice shall describe such event and the consequences of such event to
         holders of Rights under Section 11(a)(ii) hereof.

         Section 26. Notices. Notices or demands authorized by this Agreement to
be given or made by the Rights Agent or by the holder of any Rights Certificate
to or on the Company shall be sufficiently given or made if sent by first-class
mail, postage prepaid, addressed (until another address is filed in writing with
the Rights Agent) as follows:

                           Walbro Corporation
                           6242 Garfield Street
                           Cass City, Michigan 48726
                           Attention:  Corporate Secretary

Subject to the provisions of Section 21 hereof, any notice or demand authorized
by this Agreement to be given or made by the Company or by the holder of any
Rights Certificate to or on the Rights Agent shall be sent by registered or
certified mail and shall be deemed given or made upon receipt and shall be
addressed (until another address is filed in writing with the Company) as
follows:

                           Harris Trust and Savings Bank
                           P.O. Box 755
                           Chicago, Illinois 60690
                           Attention:  Corporate Agencies Administration

Notices or demands authorized by this Agreement to be given or made by the
Company or the Rights Agent to the holder of any Rights Certificate shall be
sufficiently given or made if sent by first-class mail, postage prepaid,
addressed to such holder at the address of such holder as shown on the registry
books of the Company.

      Section 27.    Supplements and Amendments. The Company may from time to
time supplement or amend this Agreement without the approval of any holders of
Rights Certificates in order to cure any ambiguity, to correct or supplement any
provision contained herein which may be defective or inconsistent with any other
provisions herein, or to make any other provisions with respect to the Rights
which the Company may deem necessary or desirable, any such supplement or
amendment to be evidenced by a writing signed by the Company and the Rights
Agent; provided, however, that from and after such time as any Person becomes an
Acquiring Person, this Agreement shall not be amended in any manner which would
adversely

                                       33

<PAGE>   37



affect the interests of the holders of Rights (except the interests of any
Acquiring Person and its Affiliates and Associates). Notwithstanding anything in
this Agreement to the contrary, no supplement or amendment that changes the
rights and duties of the Rights Agent under this Agreement will be effective
against the Rights Agent without the execution of such supplement or amendment
by the Rights Agent.

         Section 28. Determination and Actions by the Board of Directors, etc..
The Board of Directors of the Company shall have the exclusive power and
authority to administer this Agreement and to exercise all rights and powers
specifically granted to the Board of Directors, or the Company, or as may be
necessary or advisable in the administration of this Agreement, including,
without limitation, the right and power to (i) interpret the provisions of this
Agreement, and (ii) make all determinations deemed necessary or advisable for
the administration of this Agreement (including, without limitation, a
determination to redeem or not redeem the Rights or to amend the Agreement and
whether any proposed amendment adversely affects the interests of the holders of
Rights Certificates). For all purposes of this Agreement, any calculation of the
number of Common Shares or other securities outstanding at any particular time,
including for purposes of determining the particular percentage of such
outstanding Common Shares or any other securities of which any Person is the
Beneficial Owner, shall be made in accordance with the last sentence of Rule
13d-3(d)(1)(I) of the General Rules and Regulations under the Exchange Act as in
effect on the date of this Agreement. All such actions, calculations,
interpretations and determinations (including, for purposes of clause (y) below,
all omissions with respect to the foregoing) which are done or made by the Board
of Directors in good faith, shall (x) be final, conclusive and binding on the
Company, the Rights Agent, the holders of the Rights Certificates and all other
parties unless the Board of Directors specifically states that such action,
calculations, interpretation or determination is not final, conclusive and
binding, and (y) not subject the Board of Directors to any liability to the
holders of the Rights Certificates.

         Section 29. Successors.  All the covenants and provisions of this 
Agreement by or for the benefit of the Company or the Rights Agent shall bind 
and inure to the benefit of their respective successors and assigns hereunder.

         Section 30. Benefits of this Agreement. Nothing in this Agreement shall
be construed to give to any Person or corporation other than the Company, the
Rights Agent and the registered holders of valid Rights Certificates (and, prior
to the Distribution Date, the Common Shares) any legal or equitable right,
remedy or claim under this Agreement; but this Agreement shall be for the sole
and exclusive benefit of the Company, the Rights Agent and the registered
holders of valid Rights Certificates (and, prior to the Distribution Date, the
Common Shares).

         Section 31. Severability. If any term, provision, covenant or
restriction of this Agreement is held by a court of competent jurisdiction or
other authority to be invalid, void or unenforceable, the remainder of the
terms, provisions, covenants and restrictions of this Agreement shall remain in
full force and effect and shall in no way be affected, impaired or invalidated.

                                       34

<PAGE>   38




         Section 32. Governing Law. This Agreement and each Rights Certificate
issued hereunder shall be deemed to be a contract made under the laws of the
State of Delaware and for all purposes shall be governed by and construed in
accordance with the laws of such State applicable to contracts to be made and
performed entirely within such State.

         Section 33. Counterparts.  This Agreement may be executed in any number
of counterparts and each of such counterparts shall for all purposes be deemed 
to be an original, and all such counterparts shall together constitute but one 
and the same instrument.

         Section 34. Descriptive Headings.  Descriptive headings of the several
Sections of this Agreement are inserted for convenience only and shall not 
control or affect the meaning or construction of any of the provisions hereof.


                                       35

<PAGE>   39
         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed and attested, all as of the day and year first above written.

                                         WALBRO CORPORATION

Attest:


By:      /s/ DANIEL L. HITTLER           By:     /s/ MICHAEL A. SHOPE
         -----------------------                 ------------------------------
         Name: Daniel L. Hittler                 Name: Michael A. Shope
         Title: Secretary                        Title: Chief Financial Officer


                                         HARRIS TRUST AND SAVINGS BANK,
                                         as Rights Agent

Attest:


By:      /s/ GINGER LAWRENCE             By:     /s/ TOD SHAFER
         -----------------------                 ------------------------------
         Name: Ginger Lawrence                   Name: Tod Shafer
         Title: Trust Officer                    Title: Vice President


                                       36

<PAGE>   40




                                                                       EXHIBIT A


                                      FORM

                                       of

                           CERTIFICATE OF DESIGNATIONS

                                       of

                  SERIES A JUNIOR PARTICIPATING PREFERRED STOCK

                                       of

                               WALBRO CORPORATION

                         (Pursuant to Section 151 of the
                        Delaware General Corporation Law)



         WALBRO CORPORATION, a corporation organized and existing under the
General Corporation Law of the State of Delaware (hereinafter called the
"Company"), hereby certifies that the following resolution was adopted by the
Board of Directors of the Company as required by Section 151 of the General
Corporation Law at a meeting duly called and held on December 6, 1988:

         RESOLVED, that pursuant to the authority granted to and vested in the
Board of Directors of this Company (hereinafter called the "Board of Directors"
or the "Board") in accordance with the provisions of the Certificate of
Incorporation, the Board of Directors hereby creates a series of Preferred
Stock, par value $.01 per share (the "Preferred Stock"), of the Company and
hereby states the designation and number of shares, and fixes the relative
rights, preferences, and limitations thereof as follows:

         Series A Junior Participating Preferred Stock:

         Section 1. Designation and Amount. The shares of such series shall be
designated as "Series A Junior Participating Preferred Stock" (the "Series A
Preferred Stock") and the number of shares constituting the Series A Preferred
Stock shall initially be ___________. Such number of shares may be increased or
decreased by resolution of the Board of Directors; provided, that no decrease
shall reduce the number of shares of Series A Preferred Stock to a number
less than the number of shares then outstanding plus the number of shares
reserved for issuance upon the exercise of outstanding options, rights or
warrants or upon the conversion of any outstanding securities or rights issued
by the Company convertible into Series A Preferred Stock and further provided
that the Board of Directors shall increase the number of shares

                                       A-1

<PAGE>   41



constituting the Series A Preferred Stock to the extent necessary for the
Company to have available sufficient shares of such Series A Preferred Stock
available for fulfill all of the Company's obligations to holders of securities
and Rights of the Company.

         Section 2.  Dividends and Distributions.

                  (A) Subject to the rights of the holders of any shares of any
         series of Preferred Stock (or any similar stock) ranking prior and
         superior to the Series A Preferred Stock with respect to dividends, the
         holders of shares of Series A Preferred Stock, in preference to the
         holders of Common Stock, par value $.50 per share (the "Common Stock"),
         of the Company, and of any other junior stock, shall be entitled to
         receive, when, as and if declared by the Board of Directors out of the
         funds legally available for the purpose, dividends payable when and as
         dividends are declared on the Company's Common Stock in an amount,
         subject to the provision for adjustment hereinafter set forth, equal to
         100 times the aggregate per share amount of all cash dividends, and 100
         times the aggregate per share amount (payable in kind) of all non-cash
         dividends or other distributions, declared on the Company's Common
         Stock (except as provided in the next sentence). In the event the
         Company shall at any time declare or pay any dividend on the Common
         Stock payable in shares of Common Stock, or effect a subdivision or
         combination or consolidation of the outstanding shares of Common Stock
         (by reclassification or otherwise than by payment of a dividend in
         shares of Common Stock) into a greater or lesser number of shares of
         Common Stock, then in each such case the amount to which holders of
         shares of Series A Preferred Stock were entitled immediately prior to
         such event under the preceding sentence shall be adjusted by
         multiplying such amount by a fraction, the numerator of which is the
         number of shares of Common Stock outstanding immediately after such
         event and the denominator of which is the number of shares of Common
         Stock that were outstanding immediately prior to such event.

                  (B) The Company shall declare a dividend or distribution on
         the Series A Preferred Stock as provided in paragraph (A) of this
         Section immediately after it declares a dividend or distribution on the
         Common Stock.

         Section 3.  Voting Rights.  The holders of shares of Series A 
Preferred Stock shall have the following voting rights:

                  (A) Each share of Series A Preferred Stock shall entitle the
         holder thereof to 100 votes on all matters submitted to a vote of the
         stockholders of the Company.

                  (B) Except as otherwise provided herein, in any other
         Certificate of Designations creating a series of Preferred Stock or any
         similar stock, or by law, the holders of shares of Series A Preferred
         Stock and the holders of shares of Common Stock and any other capital
         stock of the Company having general voting rights shall vote together
         as one class on all matters submitted to a vote of stockholders of the
         Company.


                                       A-2

<PAGE>   42



                  (C) Except as set forth herein, or as otherwise provided by
         law, holders of Series A Preferred Stock shall have no special voting
         rights and their consent shall not be required (except to the extent
         they are entitled to vote with holders of Common Stock as set forth
         herein) for taking any corporate action.

         Section 4.  Reacquired Shares. Any shares of Series A Preferred Stock
purchased or otherwise acquired by the Company in any manner whatsoever shall be
retired and canceled promptly after the acquisition thereof. All such shares
shall upon their cancellation become authorized but unissued shares of Preferred
Stock and may be reissued as part of a new series of Preferred Stock subject to
the conditions and restrictions on issuance set forth herein, in the Certificate
of Incorporation, or in any other Certificate of Designations creating a series
of Preferred Stock or any similar stock or as otherwise required by law.

         Section 5.  Liquidation, Dissolution or Winding Up. Upon any
liquidation, dissolution or winding up of the Company, no distribution shall be
made (1) to the holders of shares of stock ranking junior (either as to
dividends or upon liquidation, dissolution or winding up) to the Series A
Preferred Stock unless, prior thereto, the holders of shares of Series A
Preferred Stock shall have received an aggregate amount per share, subject to
the provision for adjustment hereinafter set forth, equal to 100 times the
aggregate amount to be distributed per share to holders of shares of Common
Stock. In the event the Company shall at any time declare or pay any dividend on
the Common Stock payable in shares of Common Stock, or effect a subdivision or
combination or consolidation of the outstanding shares of Common Stock (by
reclassification or otherwise than by payment of a dividend in reclassification
or otherwise than by payment of a dividend in shares of Common Stock) into a
greater or lesser number of shares of Common Stock, then in each such case the
aggregate amount to which holders of shares of Series A Preferred Stock were
entitled immediately prior to such event under the proviso in clause (1) of the
preceding sentence shall be adjusted by multiplying such amount by a fraction
the numerator of which is the number of shares of Common Stock outstanding
immediately after such event and the denominator of which is the number of
shares of Common Stock that were outstanding immediately prior to such event.

         Section 6.  Consolidation, Merger, etc. In case the Company shall enter
into any consolidation, merger, combination or other transaction in which the
shares of Common Stock are exchanged for or changed into other stock or
securities, cash and/or any other property, then in any such case each share of
Series A Preferred Stock shall at the same time be similarly exchanged or
changed into an amount per share, subject to the provision for adjustment
hereinafter set forth, equal to 100 times the aggregate amount of stock,
securities, cash and/or any other property (payable in kind), as the case may
be, into which or for which each share of Common Stock is changed or exchanged.
In the event the Company shall at any time declare or pay any dividend on the
Common Stock payable in shares of Common Stock, or effect a subdivision or
combination or consolidation of the outstanding shares of Common Stock (by
reclassification or otherwise than by payment of a dividend in shares of Common
Stock) into a greater or lesser number of shares of Common Stock, then in each
such case the amount set forth in the preceding sentence with respect to the
exchange or change of shares of Series A

                                       A-3

<PAGE>   43



Preferred Stock shall be adjusted by multiplying such amount by a fraction, the
numerator of which is the number of shares of Common Stock outstanding
immediately after such event and the denominator of which is the number of
shares of Common Stock that were outstanding immediately prior to such event.

         Section 7.  No Redemption.  The shares of Series A Preferred Stock 
shall not be redeemable.

         Section 8.  Rank.  The Series A Preferred Stock shall rank, with 
respect to the payment of dividends and the distribution of assets, junior to 
all series of any other class of the Company's Preferred Stock.

         Section 9.  Amendment. The Certificate of Incorporation of the Company
shall not be amended in any manner which would materially alter or change the
powers, preferences or special rights of the Series A Preferred Stock so as to
affect them adversely without the affirmative vote of the holders of at last
two-thirds of the outstanding shares of Series A Preferred Stock, voting
together as a single class.

         IN WITNESS WHEREOF, this Certificate of Designations is executed on
behalf of the Company by its Chairman of the Board and attested by its Secretary
this _________ day of ___________, 1988.



                                                 -------------------------------
                                                 Chairman of the Board


Attest:

- ----------------------------
Secretary



                                       A-4

<PAGE>   44



                                                                       EXHIBIT B


                           Form of Rights Certificate


Certificate No.  ____                                               _____ Rights


         NOT EXERCISABLE AFTER JUNE ____, 2008 OR EARLIER IF REDEMPTION OR
         EXCHANGE OCCURS. THE RIGHTS ARE SUBJECT TO REDEMPTION AT $.01
         PER RIGHT, AND ARE VOIDABLE AND SUBJECT TO EXCHANGE ON THE TERMS SET
         FORTH IN THE RIGHTS AGREEMENT. [THE RIGHTS REPRESENTED BY THIS RIGHTS
         CERTIFICATE ARE OR WERE BENEFICIALLY OWNED BY A PERSON WHO WAS OR
         BECAME AN ACQUIRING PERSON OR AN AFFILIATE OR ASSOCIATE OF AN
         ACQUIRING PERSON (AS SUCH TERMS ARE DEFINED IN THE RIGHTS AGREEMENT).
         ACCORDINGLY, THIS RIGHTS CERTIFICATE AND THE RIGHTS REPRESENTED HEREBY
         MAY BECOME NULL AND VOID IN THE CIRCUMSTANCES SPECIFIED IN THE SECOND
         PARAGRAPH OF SECTION 11(a)(ii) OF SUCH AGREEMENT.]*

                               Rights Certificate

                               Walbro Corporation


         This certifies that ____________________, or registered assigns, is the
registered owner of the number of Rights set forth above, each of which
entitles the owner thereof, subject to the terms, provisions and conditions of
the Rights Agreement, dated as of June ____, 1998 (the "Rights Agreement")
between Walbro Corporation, a Delaware corporation (the "Company"), and Harris
Trust and Savings Bank (the "Rights Agent"), to purchase from the Company at
any time after the Distribution Date (as such term is defined in the Rights
Agreement) and prior to 5:00 p.m., Chicago, Illinois time on June ____, 2008
at the principal office of the Rights Agent, or at the office of its successor
as Rights Agent, one one-hundredth of a fully paid nonassessable share of
Series A Junior Participating Preferred Stock, par value $.01 per share (the
"Preferred Shares"), of the Company, at a purchase price of $____ per one
one-hundredth of a Preferred Share (the "Purchase Price"), upon presentation
and surrender of this Rights Certificate with the Form of Election to Purchase
duly executed. The number of Rights 

__________________________

*        The portion of the legend in brackets shall be inserted only if 
         applicable and shall replace the preceding sentence.

                                       B-1

<PAGE>   45



evidenced by this Rights Certificate (and the number of one one-hundredths of a
Preferred Share which may be purchased upon exercise hereof) set forth above,
and the Purchase Price set forth above, are the number and Purchase Price as of
June ____, 1998, based on the Preferred Shares as constituted at such date. As
provided in the Rights Agreement, the Purchase Price and the number of one
one-hundredths of a Preferred Share which may be purchased upon the exercise of
the Rights evidenced by this Rights Certificate are subject to modification and
adjustment upon the happening of certain events.

         This Rights Certificate is subject to all of the terms, provisions and
conditions of the Rights Agreement, which terms, provisions and conditions are
hereby incorporated herein by reference and made a part hereof and to which
Rights Agreement reference is hereby made for a full description of the rights,
limitations of rights, obligations, duties and immunities hereunder of the
Rights Agent, the Company and the holders of the Rights Certificates. Copies of
the Rights Agreement are on file at the principal executive offices of the
Company and the above-mentioned offices of the Rights Agent.

         This Rights Certificate, with or without other Rights Certificates,
upon surrender at the principal office of the Rights Agent, may be exchanged for
another Rights Certificate or Rights Certificates of like tenor and date
evidencing Rights entitling the holder to purchase a like aggregate number of
Preferred Shares as the Rights evidenced by the Rights Certificate or Rights
Certificates surrendered shall have entitled such holder to purchase. If this
Rights Certificate shall be exercised in part, the holder shall be entitled to
receive upon surrender hereof another Rights Certificate or Rights Certificates
for the number of whole Rights not exercised.

         Subject to the provisions of the Rights Agreement, the Rights evidenced
by this Certificate (i) may be redeemed by the Company at a redemption price of
$.01 per Right or (ii) may be exchanged in whole or in part for Preferred Shares
or shares of the Company's Common Stock, par value $.50 per share, on the terms
set forth in the Rights Agreement.

         No fractional Preferred Shares will be issued upon the exercise of any
Right or Rights evidenced hereby (other than fractions which are integral
multiples of one one-hundredths of a Preferred Share, which may, at the election
of the Company, be evidenced by depositary receipts), but in lieu thereof a cash
payment will be made, as provided in the Rights Agreement.

         No holder of this Rights Certificate shall be entitled to vote or
receive dividends or be deemed for any purpose the holder of the Preferred
Shares or of any other securities of the Company which may at any time be
issuable on the exercise hereof, nor shall anything contained in the Rights
Agreement or herein be construed to confer upon the holder hereof, as such, any
of the rights of a stockholder of the Company or any right to vote for the
election of directors or upon any matter submitted to stockholders at any
meeting thereof, or to give or withhold consent to any corporate action, or to
receive notice of meetings or other actions affecting stockholders (except as
provided in the Rights Agreement), or to receive dividends or subscription
rights, or otherwise, until the Rights evidenced by this Rights Certificate
shall have been exercised as provided in the Rights Agreement.

                                       B-2

<PAGE>   46




         This Rights Certificate shall not be valid or obligatory for any
purpose until it shall have been countersigned by the Rights Agent.

         WITNESS the facsimile signature of the proper officers of the Company
and its corporate seal. Dated as of _________________, 19__.


ATTEST:                                                WALBRO CORPORATION

____________________________________                   By:______________________

Countersigned:

HARRIS TRUST AND SAVINGS BANK


By:_________________________________
     Authorized Signature


                                       B-3

<PAGE>   47



                  [FORM OF REVERSE SIDE OF RIGHTS CERTIFICATE]

                               FORM OF ASSIGNMENT

                   (To be executed by the registered holder if
            such holder desires to transfer the Rights Certificate.)


         FOR VALUE RECEIVED, ______________________________ hereby sells, 
assigns and transfers unto _____________________________________________________

________________________________________________________________________________

                  (Please print name and address of transferee)

________________________________________________________________________________
    (Please print social security or other identifying number of transferee)

this Rights Certificate, together with all interest therein, and does hereby
irrevocably constitute and appoint ___________________ Attorney, to transfer the
within Rights Certificate on the books of the within-named Company, with full
power of substitution.

Dated:   _________________________, 19__


                                                  ______________________________
                                                  Signature


Signature Guaranteed:___________________________________________________________

      Signature must be guaranteed by an Eligible Guarantor Institution as 
defined by SEC Rule 17Ad-15 (17 C.F.R. 240.17-Ad-15).



                                       B-4

<PAGE>   48



                                   CERTIFICATE


    The undersigned hereby certifies by checking the appropriate boxes that:

                  (1) this Rights Certificate / / is / / is not being sold,
         assigned and transferred by or on behalf of a Person who is or was an
         Acquiring Person or an Affiliate or Associate of any such Person (as
         such terms are defined in the Rights Agreement);

                  (2) after due inquiry and to the best knowledge of the
         undersigned, it / / did / / did not acquire the Rights evidenced by
         this Rights Certificate from any Person who is, was or subsequently
         became an Acquiring Person or an Affiliate or Associate of any such
         Person.


Dated:   _________________________, 19__



                                                    Signature___________________


Signature Guaranteed:___________________________________________________________


                                     NOTICE

                  The signatures to the foregoing Assignment and Certificate
must correspond to the name as written upon the face of this Rights Certificate
in every particular, without alteration or enlargement or any change whatsoever.

                  The signature must be guaranteed by an Eligible Guarantor
Institution as defined by SEC Rule 17Ad-15 (17 C.F.R. 240.17-Ad-15).




                                       B-5

<PAGE>   49



                          FORM OF ELECTION TO PURCHASE

                      (To be executed if holder desires to
                        exercise the Rights Certificate.)

To:      Walbro Corporation

         The undersigned hereby irrevocably elects to exercise _____________
Rights represented by this Rights Certificate to purchase the Preferred Shares
issuable upon the exercise of such Rights (or such other securities of the
Company or of any other person which may be issuable upon the exercise of the
Rights) and requests that certificates for such Preferred Shares be issued in
the name of:


________________________________________________________________________________

________________________________________________________________________________
                         (Please print name and address)

           ___________________________________________________________
           (Please insert social security or other identifying number)

If such number of Rights shall not be all the Rights evidenced by this Rights
Certificate, a new Rights Certificate for the balance remaining of such Rights
shall be registered in the name of and delivered to:

________________________________________________________________________________

________________________________________________________________________________
                         (Please print name and address)

           ___________________________________________________________        
           (Please insert social security or other identifying number)

Dated:   _________________________, 19__

                                                    ____________________________
                                                    Signature


Signature Guaranteed:___________________________________________________________

         Signatures must be guaranteed by an Eligible Guarantor Institution as 
defined by SEC Rule 17Ad-15 (17 C.F.R. 240.17-Ad-15).


                                       B-6

<PAGE>   50



                                   CERTIFICATE


    The undersigned hereby certifies by checking the appropriate boxes that:

                  (1) the Rights evidenced by this Rights Certificate / / are
         / / are not being exercised by or on behalf of a Person who is or was
         an Acquiring Person or an Affiliate or Associate of any such Person (as
         such terms are defined in the Rights Agreement);

                  (2) after due inquiry and to the best knowledge of the
         undersigned, it / / did / / did not acquire the Rights evidenced by
         this Rights Certificate from any Person who is, was or subsequently
         became an Acquiring Person or an Affiliate or Associate of any such
         Person.


Dated:   _________________________, 19__


                                                      __________________________
                                                      Signature


Signature Guaranteed:___________________________________________________________


                                     NOTICE

                  The signatures to the foregoing Election to Purchase and
Certificate must correspond to the name as written upon the face of this Rights
Certificate in every particular, without alteration or enlargement or any change
whatsoever.

                  The signature must be guaranteed by an Eligible Guarantor
Institution as defined by SEC Rule 17Ad-15 (17 C.F.R. 240.17-Ad-15).




                                       B-7

<PAGE>   51



                                     NOTICE


         In the event the certification set forth above in the Form of
Assignment or the Form of Election to Purchase, as the case may be, is not
completed, the Company and the Rights Agent will deem the beneficial owner of
the Rights evidenced by this Rights Certificate to be an Acquiring Person or an
Affiliate or Associate thereof (as defined in the Rights Agreement) and such
Assignment or Election to Purchase will not be honored.


                                       B-8

<PAGE>   52




                                                                       EXHIBIT C


                          SUMMARY OF RIGHTS TO PURCHASE
                     PREFERRED SHARES UNDER PLAN ADOPTED BY
                               WALBRO CORPORATION


         On June 24, 1998, the Board of Directors of Walbro Corporation (the
"Company") declared a dividend of one Right for each outstanding common share (a
"Right"), par value $.50 per share (the "Common Shares"), of the Company. The
dividend is payable on July 17, 1998 (the "Record Date") to the shareholders of
record on that date. Each Right entitles the registered holder to purchase from
the Company one one-hundredth of a share of Series A Junior Participating
Preferred Stock, par value $.01 per share (the "Preferred Shares"), of the
Company at a price of $45 per one one-hundredth of a Preferred Share (the
"Purchase Price"), subject to adjustment. The description and terms of the
Rights are set forth in a Rights Agreement (the "Rights Agreement") between the
Company and Harris Trust and Savings Bank, as Rights Agent (the "Rights Agent").

         Until the earlier of (i) the close of business on the tenth day after
the first public announcement that a person or group of affiliated or associated
persons have acquired beneficial ownership of 15% or more of the outstanding
Common Shares (an "Acquiring Person"), or (ii) the close of business on the
tenth day (or such later date as may be determined by action of the Board of
Directors prior to such time as any Person becomes an Acquiring Person)
following the commencement of, or announcement of an intention to make, a tender
offer or exchange offer the consummation of which would result in the beneficial
ownership of such person or group of 15% or more of such outstanding Common
Shares (the earlier of such dates being called the "Distribution Date"), the
Rights will be evidenced by the Common Share certificates, will be transferable
only by the transfer of the Common Shares associated with such Rights and any
transfer of the Common Shares (including a transfer to the Company) will
constitute a transfer of the Rights. As described below, after a person or group
becomes an Acquiring Person, the Rights may not be redeemed or amended.

         Until the Distribution Date (or earlier redemption or expiration of the
Rights), new Common Share certificates issued after the Record Date, upon
transfer or new issuance of Common Shares, will contain a legend incorporating
the Rights Agreement by reference. Until the Distribution Date (or earlier
redemption or expiration of the Rights), the surrender for transfer of any
certificates for Common Shares outstanding as of the Record Date, even without
such notation or a copy of this Summary of Rights being attached, will also
constitute the transfer of the Rights associated with the Common Shares
represented by such certificate. As soon as practicable following the
Distribution Date, separate certificates evidencing the Rights ("Rights
Certificates") will be mailed to holders of record of the Common Shares as of
the close

                                       C-1

<PAGE>   53



of business on the Distribution Date and such separate Rights Certificates alone
will evidence the Rights.

         The Rights are not exercisable until a person, entity or group becomes
an Acquiring Person. The Rights will expire on June 30, 2008 (the "Final
Expiration Date"), unless the Final Expiration Date is extended or unless the
Rights are redeemed earlier by the Company, in each case, as described below.

         If a person or group of affiliated or associated persons becomes an
"Acquiring Person" by obtaining beneficial ownership of more than 15% of the
then outstanding Common Shares, each holder of a Right (other than those
described in the next sentence) will thereafter have the right to receive, upon
exercise, Common Shares (or, in certain circumstances, cash, property or other
securities of the Company) having a value equal to two times the Purchase Price
of the Right. All Rights that are, or (under certain circumstances specified in
the Rights Agreement) were, beneficially owned by any Acquiring Person will be
void.

         At any time after the first date of public announcement by the Company
or an Acquiring Person than an Acquiring Person has become such (a "Shares
Acquisition Date"), if (i) the Company is the surviving corporation in a merger
with any other company or entity, (ii) the Company is acquired in a merger or
other business combination transaction, (iii) 50% or more of the Company's
consolidated assets or earning power are sold, or (iv) an Acquiring Person
engages in certain "self-dealing" transactions with the Company, each holder of
a Right or a (other than those whose rights have become void) will thereafter
have the right to receive, upon the exercise thereof at the then current
Purchase Price of the Right, that number of shares of common stock of the
surviving or acquiring company which at the time of such transaction will have a
market value of two times the exercise price of such Right.

         At any time after a person or group becomes an Acquiring Person and
prior to the acquisition by such person or group of 50% or more of the
outstanding Common Shares, the Board of Directors of the Company may exchange
the Rights (other than Rights owned by such person or group which have become
void), in whole or in part, without any additional payment, for Common Shares at
an exchange ratio of one Common Share (or of a share of a class or series of the
Company's preferred shares having equivalent rights, preferences and
privileges), per Right (subject to adjustment).

         With certain exceptions, no adjustment in the Purchase Price will be
required until cumulative adjustments require an adjustment of at least 1% in
such Purchase Price. No fractional Preferred Shares will be issued (other than
fractions which are integral multiples of one one-hundredth of a Preferred
Share, which may, at the election of the Company, be evidenced by depositary
receipts) and in lieu thereof, an adjustment in cash will be made based on the
market price of the Preferred Shares on the last trading day prior to the date
of exercise.

         At any time prior to the Shares Acquisition Date, the Board of
Directors of the Company may redeem all, but not less than all, of the Rights at
a price of $.01 per Right (the

                                       C-2

<PAGE>   54


"Redemption Price").  The redemption of the Rights may be made effective at 
such time, on such basis and with such conditions as the Board of Directors in 
its sole discretion may establish.

         Immediately upon any redemption of the Rights, the right to exercise
the Rights will terminate and the only right of the holders of Rights will be to
receive the Redemption Price.

         Any of the provisions of the Rights may be amended by the Board of
Directors of the Company prior to the Shares Acquisition Date. After the Shares
Acquisition Date, the provisions of the Rights Agreement may be amended by the
Board in order to make changes which do not adversely affect the interests of 
holders of Rights (excluding the interests of any Acquiring Person).

         A copy of the Rights Agreement has been filed with the Securities and
Exchange Commission as an Exhibit to a Registration Statement on Form 8-A dated
July 8, 1998. A copy of the Rights Agreement is available free of charge from
the Company. This summary description of the Rights does not purport to be
complete and is qualified in its entirety by reference to the Rights Agreement,
which is hereby incorporated herein by reference.






                                       C-3



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