EXHIBIT 4.18 The Prudential Prudential Capital Group Suite 2525 1230 Peachtree Street, N.E. Atlanta, GA 30309 404 881-4400 Fax: 404 881-4407 March 6, 1995 Intermet Corporation 2859 Paces Ferry Road Suite 1600 Atlanta, Georgia 30339 Ladies and Gentlemen: Reference is made to the Note Agreement dated as of December 11, 1992, as amended (the "Agreement) between Intermet Corporation and The Prudential Insurance Company of America ("Prudential"). Unless otherwise defined herein, capitalized terms used herein have the meanings ascribed to such terms in the Agreement. 1. Subject to the terms and conditions set forth herein, Prudential hereby agrees that (1) paragraph 6B(2)(2) is hereby amended and restated as of December 31, 1994 as follows: (2) as of the last day of each fiscal quarter, Senior Debt to exceed the following percentage of Total Capitalization as at each fiscal quarter ending during the stated periods: Period Ratio ------ ----- Fourth Fiscal Quarter End 1994 51% First Fiscal Quarter End 1995 49% Second Fiscal Quarter End 1995 48% Third Fiscal Quarter End 1995 and thereafter 45% and (ii) the items set forth on Exhibit A attached hereto and incorporated herein by reference were not incurred in the ordinary course of business and are therefore properly added to Consolidated Net Income (Loss) of the Company for the fourth fiscal quarter of 1994 in determining Consolidated EBITDAR; provided, however, that the nature of the items listed on Exhibit A shall not be dispositive of an appropriate determination of whether any future gain or loss is incurred in the ordinary course of business of the Company. Intermet Corporation March 6, 1995 Page 2 2. This Amendment and Agreement shall be effective as of the date above written upon receipt of (i) executed counterparts hereof and (ii) a copy of a waiver and agreement to the Credit Agreement in the form attached hereto as Exhibit B. 3. Except as expressly set forth herein, this Amendment and Agreement shall not be deemed to be a waiver or modification of any provisions of the Agreement and shall not preclude the future exercise of any right, power or privilege available to any holder of a Note. 4. This Amendment and Agreement may be signed in any number of counterparts each of which shall be an original and all of which together shall constitute one and same instrument. If you are in agreement with the foregoing, please sign each copy of this Amendment and Agreement and return two of them to Prudential, together with the documentation described in paragraph 2(ii) above. Very truly yours, THE PRUDENTIAL INSURANCE COMPANY OF AMERICA By: /s/ [UNREADABLE] ------------------------------- Vice President Agree to and accepted this March 10, 1995 INTERMET CORPORATION By: /s/ John D. Ernst -------------------- title: V/P Finance