WCFab Billet Steel Exhaust Manifold Kit for 2001-2016 Select Chevrolet/GMC Duramax (WCF100363)

Fits select 2001-2016 Chevrolet Silverado and GMC Sierra 2500 HD/3500 HD (6.6L Duramax).

Upgrade your Duramax exhaust system with WCFab high-flow billet steel manifolds. Designed to replace restrictive factory cast units, these manifolds are CNC machined from billet steel and fully TIG-welded for superior strength under high exhaust gas temperatures (EGTs). Each manifold is exhaust port gasket matched and features an internally divided design to optimize gas flow for both OEM and ported cylinder heads.

The kit includes premium ARP 12-point fasteners for secure mounting and is finished in a high-temp Black Ceramic Coat rated for 2000°F. Integrated 1/8 NPT ports on both the driver and passenger side manifolds allow for the direct installation of EGT or drive pressure sensors. These manifolds are compatible with OEM-style up pipes and are engineered to pair with WCFab 2-inch Stainless High-Flow Up Pipes for maximum performance.

• CNC machined billet steel construction with full TIG welding
• Black Ceramic Coat finish rated for 2000°F
• Internally divided for optimized exhaust flow
• Dual 1/8 NPT ports for sensor integration (includes optional plugs)
• Includes ARP 12PT fasteners, washers, and assembly lube
• Includes manifold-to-head and manifold-to-up-pipe gaskets
• Manufacturer Part Number: WCF100363

Note: Up-pipe fastener kit WCF100240 is sold separately.