Exhibit 32.1

CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Modine Manufacturing Company (the "Company") on Form 10-Q for the period ended September 26, 2004 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, D. B. Rayburn, President and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Paragraph 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

1. The Report fully complies with the requirements of Section 13(a) or 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 Company.

/s/D. B. Rayburn
D. B. Rayburn
President and Chief Executive Officer
October 28, 2004

This certification accompanies this Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not be deemed filed by the Company for purposes of Section 18 of the Securities Exchange Act of 1934, as amended.