PPE 116112000 Exhaust Manifolds & Up-Pipes | 2011-2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Features:

• Fits 2011–2016 6.6L Duramax LML engines
• High-sil moly cast high-flow exhaust manifolds
• Internally sleeved 304 stainless steel up-pipes
• Larger internal diameter for improved exhaust flow
• Reduces drive pressure and backpressure
• Lowers exhaust gas temperatures (EGTs)
• Accelerates turbo spool and boost delivery
• Increases torque and horsepower output
• Improves overall fuel economy and efficiency
• Ideal for towing and performance applications
• Durable design for long-term high-heat performance
• Direct bolt-on upgrade with factory-style fitment

Give Your Duramax LML The Breathing Room It Needs

If you're ready to unlock the full potential of your 2011–2016 6.6L Duramax LML, the PPE Exhaust Manifolds and Up-Pipes kit is a must-have upgrade that brings both power and reliability to the table. This system is designed to eliminate the restrictive bottlenecks found in factory exhaust components, allowing your turbocharger to spool quicker and your engine to breathe easier. Whether you tow, haul, or just want more responsive performance on the street, this combo delivers with faster throttle response, improved fuel efficiency, and cooler exhaust gas temperatures. PPE's high-flow manifolds are built from cast high-sil moly, ensuring excellent heat resistance and long-term durability. The internally sleeved, aircraft-grade stainless steel up-pipes provide strength and flexibility where it counts, helping your engine move more exhaust volume with less resistance. It's a performance upgrade that doesn’t just improve numbers, it transforms the way your truck feels under load. If you want to feel the difference every time you drive, this is the bolt-on that gets it done.

Designed For Maximum Flow Under Heat And Pressure

The PPE 116112000 Exhaust Manifolds and Up-Pipes are engineered specifically for the 2011–2016 Duramax LML to address critical flow and thermal challenges in high-performance and heavy-duty environments. The cast high-sil moly manifolds offer increased structural integrity and resistance to warping or cracking under extreme exhaust temperatures. PPE's up-pipes are built from 304 stainless steel and feature internally sleeved bellows, which maintain durability while allowing for the necessary expansion and flex in demanding conditions. With increased internal diameter throughout, this system is capable of significantly reducing drive pressure, helping to lower EGTs and extend turbo life. The improved flow path supports quicker turbo spool-up, higher boost efficiency, and better fuel economy, especially useful when towing or hauling. Every component is designed to bolt directly to factory locations, ensuring a clean install with no fabrication needed. Ideal for both stock and modified trucks, this kit delivers measurable gains in both performance and reliability without compromising on quality. It's a smart, efficient way to improve your Duramax from the inside out.

Fits: 2011, 2012, 2013, 2014, 2015, 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML

Notes:

• Designed for 2011–2016 6.6L Duramax LML engines only.
• High-flow cast manifolds made from high-sil moly for superior heat resistance.
• Up-pipes are constructed from 304 stainless steel for strength and corrosion resistance.
• Internally sleeved bellows reduce fatigue and improve durability under thermal expansion.
• Increased internal diameter supports greater exhaust flow and reduced backpressure.
• Helps lower exhaust gas temperatures (EGTs) during towing or heavy use.
• Improves turbo spool-up and engine responsiveness.
• Direct bolt-on fit requires no modifications for installation.
• Supports power gains, better fuel economy, and overall engine efficiency.
• Ideal upgrade for stock or performance-built LML applications.