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The Wehrli Custom Fab 2" stainless up pipe kit for 2011–2016 6.6L LML Duramax replaces the OEM 1 5/8" up pipes with heavy-duty 11-gauge stainless construction and durable bellows that resist cracking. Designed for Silverado and Sierra 2500/3500 HD trucks, the kit improves exhaust flow to aid turbo spool and lower EGTs, includes gaskets, is TIG welded and bolts on without tuning when used with compatible manifolds.
Wehrli 11-16 Duramax LML Stainless 2in Up Pipe Kit w/ Gaskets
