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 configuration on 6.6L Duramax LML engines is designed for emissions compliance, but the DPF system can create additional exhaust restriction and increase heat management demands under heavy load. At the same time, the factory EGR system recirculates exhaust gases back into the intake system, which can contribute to soot and carbon buildup over time.
- The LML 4" DPF Delete Pipe & EGR Delete Package combines a race pipe with EGR delete components. helps improve exhaust flow efficiency, reduce system restriction, and simplify the factory emissions configuration for off-road and competition applications where permitted.
Key Features
- Optimized Fast Turbo Spool: The 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.
- Stops Intake Carbon Sludge & Coolant Leaks: Completely removes the factory EGR cooler, preventing abrasive soot from choking intake valves and eliminating internal coolant leak risks.
- Tailored flange Fitment: Features precision V-clamp flange geometry engineered specifically for the downpipe connection layout on early-build LML trucks.
FAQ
Q: Why is this kit specified for 2011–2015.5 models instead of all 2011–2016 LMLs?
A: GM updated the downpipe connection interface mid-way through the 2015 model year. 11-15.5 trucks use V-clamp downpipe connection. specifically fabricated to match early-build downpipe flanges.
Q: What are the sound and performance benefits of a 4" DPF delete pipe over stock?
A: The 4" race pipe eliminates severe factory backpressure, drastically lowering EGTs under load. It enables faster turbocharger spool-up and gives your LML a clean, aggressive diesel exhaust tone while keeping low-frequency cab drone to a minimum.
Q: How do I know if my truck has the correct V-band clamp connection?
A: Check the connection point near the factory downpipe area. Early LML trucks use a V-band clamp connection, while some later configurations use a 3-Bolt flange design.
Q: Should I choose a Race Pipe or a complete 4"/5" exhaust system?
A: 4" Race Pipe is a budget-friendly upgrade for daily driving and towing, while a complete 4" or 5" Dp-back exhaust is designed for maximum airflow, improved sound, and higher-performance builds. 4" offers the best balance, while 5" is better for high-power applications.
