Exhibit 99.1 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350 (SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002) Pursuant to, and solely for purposes of, 18 U.S.C. Section 1350 (Section 906 of the Sarbanes-Oxley Act of 2002), each of the undersigned hereby certifies in the capacity and on the date indicated below that: 1. The Annual Report of the Monro Muffler Brake, Inc. Profit Sharing Plan on Form 11-K for the period ended March 31, 2002 as filed with the Securities and Exchange Commission on the date hereof (the "Report") fully complies with the requirements of Section 15(d) of the Securities Exchange Act of 1934; and 2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Monro Muffler Brake, Inc. Profit Sharing Plan. /s/ Robert G. Gross Dated: September 24, 2002 - -------------------------------- Robert G. Gross Chief Executive Officer /s/ Catherine D'Amico Dated: September 24, 2002 - -------------------------------- Catherine D'Amico Chief Financial Officer - 14 -