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WCFab billet exhaust manifolds and stainless up-pipe kit for 2001–2004 LB7 Duramax replaces restrictive cast parts with TIG-welded, CNC-machined billet steel manifolds finished in black ceramic coat rated to 2000°F. The kit is port-gasket matched and internally divided for optimal flow, includes new gaskets, ARP 12PT fasteners, and assembly lube, and offers 1/8 NPT ports for EGT or pressure sensor installation.
Wehrli 01-04 Duramax LB7 Billet Exhaust Manifold & SS Up Pipes w/ Gaskets and ARP Hardware
