1 Exhibit 4.13 January 28, 1999 Intermet Corporation 5445 Corporate Drive Suite 200 Troy, MI 48098 Ladies and Gentlemen: We refer to that certain Third Amended and Restated Credit Agreement, dated as of November 14, 1996 (as amended or modified from time, the "Credit Agreement"), among Intermet Corporation ("Intermet"), the lenders from time to time parties thereto (the "Lenders"), SunTrust Bank, Atlanta as Agent, and NBD Bank and First Union National Bank (formerly First Union National Bank of North Carolina) as Co-Agents. Capitalized terms used herein and not defined herein have the meanings assigned to them in the Credit Agreement. As you have requested, we hereby amend the definition of "Maturity Date" set forth in Section 1.01 of the Credit Agreement by replacing such definition in its entirety with the following: "Maturity Date" shall mean the earlier of (i) January 1, 2000, and (ii) the date on which all amounts outstanding under this Agreement have been declared or have automatically become due and payable pursuant to the provisions of Article VIII. The extension of the Maturity Date pursuant hereto is a renewal and amendment of the Commitments previously outstanding under Credit Agreement and shall not be deemed to be a novation with respect thereto. Except as expressly set forth herein, this letter agreement shall not be deemed to waive, amend or modify any other provision of the Credit Documents or any other agreement between you and us, and shall not serve as a consent, waiver or amendment to any other matter prohibited by the terms and conditions of the Credit Documents. THIS LETTER AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED AND ENFORCED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF GEORGIA (WITHOUT GIVING EFFECT TO THE CONFLICT OF LAW PRINCIPLES THEREOF). This letter agreement may be executed in one or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same document. Please countersign below to evidence your consent to the foregoing amendment and your acknowledgment and agreement that Obligations, including without limitation, all Loans and Letter of Credit Obligations, remain secured by the Security Documents after giving effect to this amendment. Please have the Guarantors countersign below to evidence their consent to Intermet agreeing to this amendment and to reaffirm, acknowledge and agree that all Obligations, including without limitation, all Loans and Letter of Credit Obligations, remain guaranteed by the Guarantors jointly and severally pursuant to the terms of the Guaranty Agreement and remain secured by the Security Documents after giving effect to this amendment. Very truly yours, SUNTRUST BANK, ATLANTA, Individually and as Agent 2 By: /s/ Shelley M. Browne By: /s/ Charles C. Pick --------------------- ------------------- Name: Shelley M. Browne Name: Charles C. Pick Title: Vice President Title: Vice President NBD BANK, individually and as Co-Agent By: /s/ William C. Goodhue ---------------------- Name: William C. Goodhue Title: First Vice President FIRST UNION NATIONAL BANK, formerly First Union National Bank of North Carolina, individually and as Co-Agent By: /s/ Kent Davis -------------- Name: Kent Davis Title: V.P. COMERICA BANK By: /s/ Mark A. Reifel ------------------ Name: Mark A. Reifel Title: V.P. ABN AMRO BANK N.V. By: /s/ John J. Mack By: /s/ John M. Ellenwood ---------------- --------------------- Name: John J. Mack Name: John M. Ellenwood Title: Vice President Title: Group Vice President THE BANK OF NOVA SCOTIA By: /s/ F.C.H. Ashby ---------------- Name: F.C.H. Ashby Title: Senior Manager Loan Operation HARRIS TRUST AND SAVINGS BANK By: /s/ Kirby M. Law ---------------- Name: Kirby M. Law Title: Vice President LANDESBANK SAAR GIROZENTRALE By: /s/ Thinnes Manfred By: /s/ Humburg Frank ------------------- ----------------- Name: Thinnes Manfred Name: Humburg Frank Title: Head of Department Title: Area Manager 3 INTERMET INTERNATIONAL, INC. By: /s/ M. Skrzypczak ----------------- Name: Michael Skrzypczak Title: Asst. Treasurer ALEXANDER CITY CASTINGS COMPANY, INC. By: /s/ M. Skrzypczak ----------------- Name: Michael Skrzypczak Title: Asst. Treasurer NEW RIVER CASTINGS COMPANY By: /s/ M. Skrzypczak ----------------- Name: Michael Skrzypczak Title: Asst. Treasurer We consent to the foregoing amendment to the definition of Maturity Date and acknowledge and agree that all Obligations, including without limitation, all Loans and Letter of Credit Obligations, remain secured by the Security Documents after giving effect to such amendment. INTERMET CORPORATION By: /s/ M. Skrzypczak ----------------- Name: Michael Skrzypczak Title: Asst. Treasurer We consent to Intermet agreeing to the foregoing amendment to the definition of Maturity Date and reaffirm, acknowledge and agree that all Obligations, including without limitation, all Loans and Letter of Credit Obligations, remain guaranteed by us jointly and severally pursuant to the terms of the Guaranty Agreement and remain secured by the Security Documents after giving effect to such amendment. LYNCHBURG FOUNDRY COMPANY By: /s/ M. Skrzypczak ----------------- Name: Michael Skrzypczak Title: Asst. Treasurer IRONTON IRON, INC. By: /s/ M. Skrzypczak ----------------- Name: Michael Skrzypczak Title: Asst. Treasurer NORTHERN CASTINGS CORPORATION By: /s/ M. Skrzypczak ----------------- Name: Michael Skrzypczak Title: Asst. Treasurer