High Flow Exhaust Manifolds with Up-Pipes
Available for 2001-2015 Duramax equipped trucks.
NOTICE: LMM trucks require heater modifications on driver's side. Call for details.
▪ Cast High-Silicon Moly iron high-flow manifold construction
▪ Significant reduction in exhaust back pressure
▪ Free flowing Stainless Steel Inner Liner Bellows
▪ Stainless Steel 11-gauge .120-inch wall diameter Up-Pipes
▪ Built in bosses, pre-drilled and tapped 1/8" NPT for EGT gauge
Factory manufacturing process leaves the Up-Pipe bellows’ inside liner significantly undersized and deformed causing excessive restriction. PPE’s bellows are larger in diameter by 37% providing increased flow.
Legal only for racing vehicles which may never be used on the highway. Not available for shipping to California