Wehrli 01-16 Chevrolet Duramax Exhaust Manifold Kit w/ Gaskets & HardwareWCFab's 2001 2016 Duramax Billet Exhaust Manifolds replace the restrictive factory cast parts with high strength, TIG welded high flow billet steel components. These manifolds are exhaust port gasket matched and internally divided for optimal flow with OEM or ported cylinder heads. Outlet locations allow full compatibility with OEM style up pipes and are designed to be paired with WCFab's 2" Stainless High Flow Up Pipes (sold separately) for optimized
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