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Wehrli 2" stainless driver-side up pipe for 2001–2016 Chevrolet 6.6L Duramax (LB7, LLY, LBZ, LMM, LML) replaces the thin, leak-prone OEM piece with an 11-gauge TIG-welded unit. Designed to work with factory or WCFab billet exhaust manifolds for single or twin turbo setups, it increases turbo spool-up, lowers EGTs and includes up pipe gaskets; 2007.5–2010 LMM needs a coolant bypass relocation fitting.
Wehrli 01-16 Chevrolet 6.6L Duramax 2in Stainless Driver Side Up Pipe w/Gaskets (Single/Twin Turbo)
