Replace the lightweight 16G, leak-prone, 1 5/8" OEM up pipes with these heavy-duty 11 gauge 2" Stainless up pipe kit. HD Stainless Bellows that will not crack and leak like OEM. Increase Turbo spool-up and decrease EGTs. This kit is for use with single turbo applications and factory exhaust manifolds. - - NOTE: These up pipes ONLY fit with OEM exhaust manifolds or WCFab Duramax Billet Exhaust Manifolds (WCF100363). - - Designed for use with WCFab downpipe. OEM and other aftermarket downpipes may require additional modifications - - Replaces the following GM Part numbers: 97223167, 97302261
