01-04 Duramax PPE Manifolds & Up Pipes Truck Accessory Level 1: 25 HP &

Level 1: 25 HP & 70 lb-ft

3x 10-32 x 3/8” Button Head Screws

SW # 1 : 30 Hp increase

Improved exhaust flow

Finned aircraft aluminum construction

01-04 Duramax PPE Manifolds & Up Pipes Truck Accessory Level 1: 25 HP &PPEs High Flow Exhaust Manifolds and Up Pipes have a 53% greater flow over stock, NO EGR PROVISION PPE Manifolds are made from high quality cast iron and the Up Pipes are made from 11 gauge 304 stainless steel. The aircraft grade 304 stainless steel Up Pipe bellows are high flow, internally sleeved, and have an increased inner diameter. Features: Cast Hi Sil Moly iron high flow manifold construction Significant reduction in exhaust back pressure Free