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Wehrli Custom Fab billet exhaust manifolds for 2001–2016 Duramax replace restrictive cast manifolds with TIG-welded, CNC-machined billet steel components. These manifolds are exhaust-port gasket matched and internally divided for optimum flow with OEM or ported heads, and include new gaskets, ARP 12-point fasteners, and assembly lube. Finished in black ceramic coat rated to 2000°F, they accept OEM-style up pipes.
Wehrli 01-16 Chevrolet Duramax Exhaust Manifold Kit w/ Gaskets & Hardware
