Wehrli 01-04 Chevrolet 6.6L Duramax LB7 2in Stainless Up Pipe Kit w/Gaskets - Twin Turbo

Replace the lightweight, 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 used with twin turbo applications and factory exhaust manifolds or WCFab Duramax Billet Exhaust Manifolds (WCF100363)

they WILL NOT clear a conventional downpipe routed behind the engine. Both sides are nearly symmetrical, with no indents for a conventional downpipe to clear. - - NOTE: These up pipes WILL NOT CLEAR a standard downpipe routing behind the engine. - - For Compound or Twin Turbo Applications ONLY!