EXHIBIT 32

Certifications of Chief Executive Officer and Chief Financial Officer

Pursuant to 18 U.S.C. Section 1350

In connection with the Annual Report of Metaldyne Performance Group Inc. (the “Company”) on Form 10-K for the period ended December 31, 2016 (the “Report”), each of the undersigned officers of the Company certifies, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that to the best of such officer’s 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.

Date: March 6, 2017

/s/ George Thanopoulos |  | /s/ Mark Blaufuss
Signature |  | Signature
George Thanopoulos |  | Mark Blaufuss
Chief Executive Officer |  | Chief Financial Officer

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.