WCFab Billet Exhaust Manifold & 2in Stainless Up Pipe Kit for 2017-2025 Chevrolet/GMC 2500/3500 HD (6.6L L5P) - WCF100226

Fits 2017-2025 Chevrolet Silverado and GMC Sierra 2500/3500 HD (6.6L L5P Duramax).

The WCFab Billet Exhaust Manifold and Up Pipe Kit replaces the restrictive factory cast iron components with high-flow, CNC-machined billet steel manifolds and 2-inch stainless steel up pipes. Designed to eliminate flow bottlenecks, these manifolds are exhaust port gasket matched and feature an internally divided design to optimize exhaust gas velocity and pulse tuning for both OEM and ported cylinder heads. The manifolds maintain full compatibility with the factory emissions system by including the necessary EGR riser flange and sensor ports, including a 1/8 NPT port on the driver-side manifold for EGT or drive pressure monitoring.

Constructed for extreme heat cycles, the manifolds are fully TIG-welded and finished in a high-temp black ceramic coating rated for up to 2000°F. The kit includes premium ARP 12-point fasteners and all required gaskets for a complete, leak-free installation.

• CNC-machined billet steel exhaust manifolds for maximum strength
• 2-inch high-flow stainless steel up pipes
• High-temp Black Ceramic Coat finish (rated to 2000°F)
• Gasket matched and internally divided for optimized flow
• Integrated 1/8 NPT port with plug for EGT sensors
• Retains factory emissions equipment and EGR functionality
• Includes ARP 12PT fasteners, washers, gaskets, and assembly lube
• Manufacturer Part Number: WCF100226