FITMENT
- 2011-2015.5 6.6L Silverado & Sierra Duramax 2500HD/3500HD LML engine with a V-Band Clamp.
- Does NOT Fit 2015.5-2016 models equipped with the 3-bolt flange. Please check underneath your truck!
- Please physically inspect underneath your truck to verify your turbo discharge style before purchasing!
DESCRIPTION
Product Overview
- The factory emissions system on 6.6L Duramax LML engines can create multiple airflow and contamination concerns. The DPF system adds exhaust restriction and heat management demands, while the EGR system recirculates soot into the intake tract.
- At the same time, the factory CCV system introduces oil vapor into the intake system, which can combine with soot over time and contribute to carbon buildup, reduced airflow efficiency, and increased maintenance concerns.
Key Features
- Optimized Fast Turbo Spool: 4" pipe diameter maintains ideal exhaust gas velocity for faster turbocharger spool-up, crisp throttle response, and minimal cab drone.
- Reduces EGTs & Ends Active Regens: Replaces the heavy, restrictive DPF canister with a smooth 4" race pipe to eliminate primary exhaust backpressure and stop fuel-draining regenerations.
- Dual-Source Intake Protection: Removes EGR soot and reroutes CCV oil mist away from the engine—stopping carbon sludge buildup and keepin turbo, intercooler, and intake tract dry and claen.
- Saves Maximum Labor & Shop Costs: Installing all three systems at once avoids duplicate teardown shop labor around the tight rear engine compartment and chassis.
FAQ
Q: Does adding a muffler to the 4" race pipe sacrifice any horsepower or turbo spool speed?
A: No. The straight-through, perforated-core muffler allows exhaust gases to pass without backpressure—delivering the exact same horsepower gains and fast turbo spool as a straight pipe.
Q: Will this kit lower my EGTs when towing heavy loads?
A: Yes, significantly. Replacing the restrictive factory DPF with a 4" mandrel-bent pipe and deleting the EGR lower, keeping your engine cooler and maintaining peak power during heavy towing.
Q: How much horsepower and torque can I gain by installing this complete kit?
A: Power gains depend on the tune and supporting modifications. This kit improves airflow efficiency by reducing exhaust restriction and intake contamination. Combined with proper tuning, it can help unlock significant horsepower, torque, and throttle response improvements on the LML Duramax.
Q: What is the main purpose of choosing a race pipe with an integrated muffler?
A: The muffler eliminates harsh high-frequency exhaust rasp and prevents annoying interior cab drone during highway cruising or heavy towing, while still delivering a deep, aggressive diesel exhaust tone outside the truck.
