PPE High Flow Exhaust Manifold (Raw) with Up-pipes - 01-04 GM 6.6L Duramax LB7

PE High Flow Exhaust Manifold with Up-pipes - 01-04 GM 6.6L Duramax LB7 Replacing your stock Manifold and Up-Pipes should be your first step in building a high performance exhaust system. These exhaust manifolds were co-designed by Honeywell (Garrett) and PPE using CAD software to maximize flow characteristics. The up-pipe bellows are high flow, internally sleeved and aircraft grade! Our Race High Flow Exhaust Manifolds and Up-Pipes lower EGTs, reduce drive pressure, and accelerate turbo spool-up while maintaining reliability. Perfect for upgraded turbo systems and nitrous equipped trucks with high EGTs. Also improves performance and fuel economy of engines with upgraded air/fuel systems. Cast hi-sil moly iron high flow manifold construction Significant reduction in drive pressures 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 sensor