Exhibit 32.2

Certification of Chief Executive Officer and Chief Financial Officer of Neenah Foundry Company pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Solely for the purposes of complying with 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, we, the undersigned President and Chief Executive Officer, and Corporate Vice President — Finance and Chief Financial Officer of Neenah Foundry Company (the “Company”), hereby certify, based on our knowledge, that the Quarterly Report on Form 10-Q of the Company for the quarter ended March 31, 2008 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

DATE: May 13, 2008

/s/ Robert E. Ostendorf, Jr.

Robert E. Ostendorf, Jr.

President and Chief Executive Officer

/s/ Gary W. LaChey

Gary W. LaChey

Corporate Vice President — Finance

and Chief Financial Officer