2017-2022 Duramax 4" CAT & DPF Race Pipe - No Muffler

All ECM calibrations are delt with on a first come first serve basis. Most requests will be completed within 24-72 hours. Revisions should be requested through email and will be accommodated accordingly to the request.

Peakside Performance is not responsible for damage resulting from any modification performed by, produced by or recommended by us. Buyer assumes all risk for modifications and is responsible for any mechanical failures resulting from these modifications. Completely stock vehicles break every day for no reason.