Document:

<PAGE>   1
                                                                        EXBT10-6

                                 NOTE AMENDMENT
                         (10 1/2% Senior Unsecured Note)

         This Amendment No. 2 to Note dated as of April 30, 2000 (the
"Amendment"), between Lexington Precision Corporation, a Delaware corporation
(the "Company"), and Tri-Links Investment Trust, a Delaware trust (as
successor-in-trust to Nomura Holding America, Inc.) ("Tri-Links").

         WHEREAS, Tri-Links is the holder of that certain 10 1/2% Senior
Unsecured Note due May 1, 2000, of the Company in the original principal amount
of the U.S. $7,500,000, dated October 27, 1997, No. SU-1, as amended by
Amendment No. 1 dated as of January 31, 2000 (the "Note");

         WHEREAS, the Company and Tri-Links desire to amend the Note on and
subject to the terms hereof;

         NOW, THEREFORE, in consideration of the mutual covenants contained
herein and for other good and valuable consideration, the receipt and adequacy
of which are hereby acknowledged, the parties hereto intending to be legally
bound, hereby agree as follows:

         1. AMENDMENT OF NOTE.

         The first paragraph on page 1 of the Note is hereby amended to extend
the maturity date of the Note from May 1, 2000, to August 1, 2000, by replacing
the reference to "May 1, 2000," with "August 1, 2000."

         2. WAIVER.

         Subject to paragraph 3, hereof, Tri-Links hereby waives, until August
1, 2000, any Event of Default under the Note resulting solely from the failure
of the Company to pay any principal or interest due on February 1, 2000 in
respect of the Company's 12 3/4% Senior Subordinated Notes due February 1, 2000
("Other Indebtedness").

         3. RESCISSION OF WAIVER.

                  The foregoing waiver shall be automatically rescinded, without
notice to the Company, in the event that the holders of the Other Indebtedness,
or the trustee in respect thereof, seeks to enforce or exercise any remedies in
respect thereof.

         4. EFFECTIVE DATE.

         This Amendment shall be deemed effective as of April 30, 2000.
Tri-Links hereby waives any Default or Event of Default as a result of the
failure to pay the principal amount of the Note on May 1, 2000. Tri-Links agrees
that interest shall be paid at the rate set forth in paragraph 1 of the Note and
that the provisions of paragraphs 2.2 and 4(b) of the Note shall not apply to
any payment that is made when due on the Note, as amended pursuant to Section 1
of this Amendment.

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<PAGE>   2

         5. APPLICABILITY; LEGEND.

         This Amendment shall amend the Note and each replacement note issued
upon transfer of, in exchange for or in lieu of the Note. Tri-Links agrees that
it will cause the following legend to be placed prominently on the Note and that
any replacement notes issued by the Company upon transfer of, in exchange for,
or in lieu of the Note shall have such legend placed thereon:

                  THIS NOTE HAS BEEN AMENDED PURSUANT TO THAT CERTAIN AMENDMENT
         NO. 2 TO NOTE DATED AS OF JANUARY 28, 2000, A COPY OF WHICH IS
         AVAILABLE FOR INSPECTION AT THE OFFICES OF THE COMPANY AT 767 THIRD
         AVENUE, 29TH FLOOR, NEW YORK, NEW YORK, AND REFERENCE SHOULD BE MADE
         THERETO FOR THE TERMS THEREOF.

         6. REPRESENTATIONS AND WARRANTIES. Each of the parties represents and
warrants that: (a) the execution, delivery and performance of this Amendment
have been duly authorized by all requisite action on its part; and (b) this
Amendment has been duly executed and delivered by it and constitutes its legal,
valid, and binding agreement, enforceable against it in accordance with its
terms, except as such enforceability may be limited by applicable bankruptcy,
insolvency, reorganization, moratorium, or similar laws affecting the
enforceability of creditors' rights generally or general equitable principles.

         7. NO OTHER AMENDMENTS.

         Except as expressly amended, waived, modified, and supplemented hereby,
the Note shall remain in full force and effect in accordance with its terms.

         8. GENERAL PROVISIONS.

         (a) DEFINED TERMS. Capitalized terms used herein, unless otherwise
defined herein, shall have the meaning ascribed thereto in the Note.

         (b) COUNTERPARTS. This Amendment may be executed by the parties in any
number of counterparts and all of said counterparts taken together shall be
deemed to constitute one and the same instrument. This Amendment may be signed
by facsimile transmission of the relevant signature pages hereof.

         (c) GOVERNING LAW. This Amendment shall be governed by, and construed
and interpreted in accordance with, the internal laws of the State of New York.

         (d) SUCCESSORS AND ASSIGNS. This Amendment shall be binding upon and
inure to the benefit of the successors and assigns of the parties hereto and any
and all transferees and holders of the Note or any replacement note.

         (e) HEADINGS. The paragraph headings of this Amendment are for
convenience of reference only and are not to be considered in construing this
Amendment.

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<PAGE>   3

                  IN WITNESS WHEREOF, the Company and Tri-Links have caused this
Amendment to be duly executed and delivered by their respective proper and duly
authorized officers effective as of the first date written above.

                                        LEXINGTON PRECISION CORPORATION

                                        By:        Warren Delano
                                                -------------------------------
                                        Name:      Warren Delano
                                                -------------------------------
                                        Title:     President
                                                -------------------------------

                                        TRI-LINKS INVESTMENT TRUST by Wilmington
                                        Trust Company as Owner Trustee

                                        By:        David A. Vanaskey, Jr.
                                                -------------------------------
                                        Name:      David A. Vanaskey, Jr.
                                                -------------------------------
                                        Title:     Vice President
                                                -------------------------------

                                     CONSENT

         The undersigned, Lexington Rubber Group, Inc. (formerly Lexington
Components, Inc.), a Delaware corporation, hereby consents to Amendment No. 2 to
Note (the "Amendment") dated and effective as of April 30, 2000, between
Lexington Precision Corporation (the "Company") and Tri-Links Investment Trust
(as successor-in-interest to Nomura Holding America, Inc.), which amends the
Company's 10 1/2% Senior Unsecured Note due May 1, 2000 (the "Note"), as amended
by Amendment No. 1 dated as of January 31, 2000, and hereby confirms and agrees
that its Guarantee of the Note shall continue to be in full force and effect and
shall apply to the Note as amended by the Amendment and that all references in
said Guarantee to "Note" or "Notes" shall refer to the Note as amended by the
Amendment.

                                             LEXINGTON RUBBER GROUP, INC.

                                             By:     Warren Delano
                                                -------------------------------
                                             Name:   Warren Delano
                                                  -----------------------------
                                             Title:  President
                                                   ----------------------------

                                      -3-<PAGE>   1

                                                                        EXBT10-7

                           FOURTH AMENDMENT AGREEMENT

         FOURTH AMENDMENT AGREEMENT dated as of April 30, 2000 between Lexington
Rubber Group, Inc., a Delaware corporation ("LRGI"), formerly known as Lexington
Components, Inc., which, in turn, was formerly known as EPI Acquisitions Corp.
("EPI"), and Paul H. Pennell ("Pennell").

         WHEREAS, EPI and Pennell entered into certain financing agreements
pursuant to that certain Asset Purchase Agreement dated as of November 30, 1988
(the "Purchase Agreement") between EPI and Pennell;

         WHEREAS, such financings agreements consist of a Promissory Note dated
November 30, 1988 from EPI to Pennell in the original principal amount of
$3,530,000, (the "Note"; the Note, as heretofore amended and as amended by this
Amendment Agreement, is referred to as the "Amended Note"), a Mortgage dated as
of November 30, 1988 from EPI to Pennell (the "Mortgage") and a Security
Agreement dated as of November 30, 1988 between EPI and Pennell (the "Security
Agreement"; the Note, the Mortgage and the Security Agreement, as the same have
heretofore have been or contemporaneously are being amended, modified or
supplemented, are herein collectively referred to as the "Financing
Agreements");

         WHEREAS, the Note was amended by that certain Amendment Agreement dated
as of November 30, 1991, and recorded with the Clerk of Court of York County,
South Carolina as Book 355 at Page 195 on December 16, 1991.

         WHEREAS, pursuant to the terms thereof, the principal amount of the
Note and the term thereof have been amended as a result of that certain Release
and Notice Agreement dated as of March 31, 1993 between LCI and Pennell;

         WHEREAS, the Note was amended by that certain Second Amendment
Agreement dated as of June 23, 1998 and effective on May 1, 1998, and recorded
with the Clerk of Court of York County, South Carolina, in Volume 2294 at Page
107 on June 24, 1998;

         WHEREAS, the Note was amended by that certain Third Amendment Agreement
dated as of January 31, 2000 and recorded with the Clerk of Court of York
County, South Carolina; and

         WHEREAS, LRGI and Pennell desire to further amend the Note in the
manner set forth below;

         NOW, THEREFORE, for good and valuable consideration, the receipt and
adequacy of which are hereby acknowledged, LRGI and Pennell, intending to be
legally bound, hereby agree as follows:

         1. AMENDMENT OF NOTE. (a) The Note, as amended, is hereby further
amended by deleting therefrom the second and third paragraph on page 1 thereof
in their entirety and substituting therefor the following paragraph:

         The principal of and interest on this Note shall be payable as follows:

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<PAGE>   2

         (i) Monthly interest only payments in the amount of $13,700.16 each
shall be payable on the last day of each month commencing May 31, 1998 and on
the last day of each month thereafter until July 31, 2000. Simple interest on
the principal amount hereunder shall accrue at the rate of 12% per annum until
the principal balance is paid in full;

         (ii) The principal sum of the Note, together with all accrued and
unpaid interest thereon, if any, shall be due and payable on July 31, 2000; and

         (iii) Any payment which is required to be made on a Saturday, Sunday or
legal holiday shall be payable on the next succeeding day which is not a
Saturday, Sunday or legal holiday.

         (b) Pennell shall cause the following legend to be placed prominently
on the Note;

                   THIS NOTE HAS BEEN AMENDED BY A FOURTH
                   AMENDMENT AGREEMENT DATED AS OF APRIL 30,
                   2000, A COPY OF WHICH IS AVAILABLE FOR
                   INSPECTION AT THE OFFICES OF BUYER AT 767
                   THIRD AVENUE, 29TH FLOOR, NEW YORK, NEW
                   YORK.

         (c) To the extent that this Fourth Amendment Agreement amends the Note,
as heretofore amended, the Note is hereby amended. All references to the Note in
the Purchase Agreement and the Financing Agreements or any other agreement or
document relating to the Financing Agreements shall be deemed to refer to the
Amended Note.

     2. FURTHER ASSURANCES. Each of the parties hereto shall execute and deliver
such additional documents and take such additional actions as may be requested
by the other party to effectuate the provisions and purposes of this Fourth
Amendment Agreement. In connection therewith, LRGI shall cause Lexington
Precision Corporation to execute and deliver to Pennell a consent in the form of
EXHIBIT A hereto (the "Consent").

     3. MORTGAGE. For purposes of notifying persons of the amendment of the Note
pursuant to this Fourth Amendment Agreement and the effect thereof upon the
Mortgage, it is intended that this Fourth Amendment Agreement shall be filed
with the real estate mortgages of York County, South Carolina. For purposes of
the foregoing, EXHIBIT B hereto sets forth a description of the real property to
which the Mortgage relates.

     4. REPRESENTATIONS AND WARRANTIES. LRGI hereby represents and warrants to
Pennell that: (a) LRGI has full power and authority to execute and deliver this
Fourth Amendment Agreement; (b) this Fourth Amendment Agreement constitutes the
legal, valid and binding obligation of LRGI, enforceable against LRGI in
accordance with its terms, except as such enforceability may be limited by
applicable bankruptcy, insolvency, reorganization, moratorium or similar laws
affecting enforceability of creditors' rights generally or equitable principles
at the time in effect; (c) the execution, delivery and performance by LRGI of
this Fourth Amendment Agreement have been duly authorized by all requisite
corporate action of LRGI; and (d) the execution and delivery by LRGI of this
Fourth Amendment Agreement and the performance by LRGI of the Amended Note will
not (i) violate any law or regulation binding upon LRGI or the Certificate of
Incorporation or By-laws of LRGI, (ii) violate or constitute

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(with due notice or lapse of time or both) a default under any indenture,
agreement, license or other instrument to which LRGI is a party or by which it
or any of its properties may be bound, (iii) violate any order of any court,
tribunal or governmental agency binding upon LRGI or its properties, (iv) result
in the creation or imposition of any Lien of any nature whatsoever upon any
properties or assets of LRGI other than pursuant to the Financing Agreements, or
(v) require any license, consent or approval of any governmental agency or
regulatory authority.

     5. MISCELLANEOUS. (a) (a) This Fourth Amendment Agreement shall be governed
by and construed and interpreted in accordance with the laws of the State of New
York without reference to its principles of conflicts of law.

         (b) Except as expressly amended hereby, all terms and conditions of the
Financing Agreements and all rights of Pennell and obligations of LRGI
thereunder and under all related documents, shall remain in full force and
effect.

         (c) LRGI hereby agrees to pay on demand all costs and expenses
(including without limitation the reasonable fees and expenses of counsel to
Pennell) incurred by Pennell in connection with the negotiation, preparation,
execution and delivery of this Fourth Amendment Agreement and all related
documents.

         (d) This Fourth Amendment Agreement may be executed by one or more of
the parties hereto on any number of separate counterparts, and all of said
counterparts taken together shall be deemed to constitute one and the same
instrument.

     IN WITNESS WHEREOF, the parties hereto have executed this Fourth Amendment
Agreement as of the date first above written.
<TABLE>
<S>                                             <C>                                             <C>

IN THE PRESENCE OF:                             LEXINGTON RUBBER GROUP, INC.                    (SEAL)

Karen Novak                                     By: Warren Delano
--------------------------------------------        ------------------------------------------
Witness (as to Lexington Rubber Group, Inc.)        Warren Delano
                                                    President
Linda Green Hawkins
--------------------------------------------
Witness (as to Lexington Rubber Group, Inc.)

Phyllis Pennell                                 Paul H. Pennell                                 (SEAL)
--------------------------------------------    ----------------------------------------------
Witness (as to Paul H. Pennell)                 Paul H. Pennell

Paula E. Morris
-------------------------------------------
Witness (as to Paul H. Pennell)

</TABLE>

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