Pacific Performance Engineering 116112000 High-Flow Exhaust Manifolds with Up-Pipes Kit

The Pacific Performance Engineering 116112000 High-Flow Exhaust Manifolds with Up-Pipes Kit is designed to maximize exhaust flow and performance for 2011-2016 GM 6.6L Duramax LML engines. This complete performance upgrade addresses the factory bellows failure issue while increasing exhaust flow by 20 percent to reduce backpressure and lower exhaust gas temperatures.

Key Features:

• Cast high-silicon molybdenum iron manifold construction for superior durability
• Aircraft-grade 304 stainless steel up-pipes with internally-sleeved bellows
• 11-gauge .120-inch wall thickness with 2-inch outside diameter up-pipes
• Increased inner diameter design for maximum exhaust flow
• Built-in bosses pre-drilled and tapped 1/8-inch NPT for EGT gauge sensor
• 50 States emissions legal (CARB E.O. #D-701-19)
• Significant reduction in exhaust backpressure and EGTs
• Accelerated turbo spool-up for improved throttle response
• Enhanced power output and fuel economy

Complete Kit Includes:

• Driver and passenger side high-flow exhaust manifolds
• Two PPE up-pipes with free-flowing stainless steel inner liner bellows
• Down pipe support bracket
• 304 stainless steel manifold gaskets
• Up-pipe gaskets
• Manifold bolts and all necessary hardware

This direct-replacement kit eliminates the weak factory bellows design that commonly fails and causes exhaust leaks. The entire manifold and up-pipe exhaust system works together to lower exhaust gas temperatures, accelerate turbo spool-up, increase power and fuel economy while maintaining long-term reliability. Installation note: 2015-2016 models require minor modification to the upper control arm bushing heat shield for proper clearance.