Wehrli 17-24 L5P Duramax Billet Exhaust Manifold Kit w/ Gaskets and ARP Hardware

Replaces restrictive factory cast exhaust manifolds with high-strength, TIG-welded, high-flow billet steel components. Designed to improve exhaust flow, turbo spool up, lower EGTs, and increase power/economy. Exhaust port gasket matched and internally divided for optimal flow with OEM or ported cylinder heads. Compatible with OEM style up pipes. Includes new gaskets (manifold to cylinder head, EGR flange, manifold to up pipe) and ARP 12PT fasteners. Driver-side manifold includes a 1/8 NPT port (with optional plug) for EGT or drive pressure sensor. Black Ceramic Coat finish (rated 1800°F). No tuning required. Fully compatible with vehicle emissions systems.