Wehrli 01-04 Duramax LB7 Billet Exhaust Manifold & SS Up Pipes w/ Gaskets and ARP Hardware

Upgrade your 2001-2004 LB7 Duramax with WCFab's Billet Exhaust Manifold & 2" Stainless Up Pipe Kit. Replaces restrictive factory cast parts with high-strength, TIG-welded, high-flow billet steel components, enhancing exhaust flow, improving turbo spool, lowering EGTs, and increasing power/economy. Manifolds are exhaust port gasket matched, internally divided, and finished in Black Ceramic Coat (1800ºF rated). Includes new gaskets, ARP 12PT fasteners, and assembly lube. Up Pipe Kit replaces lightweight 16G, leak-prone 1 5/8" OEM up pipes with heavy-duty 11 gauge 2" Stainless pipes and HD Stainless Bellows. For single turbo applications and factory exhaust manifolds.