The PPE 116112000 High-Flow Exhaust Manifolds with Up-Pipes for your 2011-2016 GM 6.6L Duramax increase exhaust flow by 20 percent and are 50 state emissions legal. Designed to outlast your truck the manifolds are made from high-quality cast iron and the up pipes are made from stainless steel. Plus the aircraft grade Up-Pipe bellows are high-flow, internally sleeved, and have an increased inner diameter.
- 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
Note: On 2015-2016 models minor modification to the upper shock mount is required for installation.