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
- High backpressure, trapped exhaust heat, and persistent carbon accumulation restrict the power delivery and airflow efficiency of 6.6L Duramax LML trucks. The factory DPF acts as a major exhaust choke point under heavy towing, while the stock EGR system constantly introduces abrasive soot back into the engine's fresh air supply.
- Streamline your truck’s breathing tract with this complete LML 4" Race Pipe & EGR Delete Package. Designed to open up exhaust scavenging and eliminate exhaust gas recirculation, it optimizes overall flow efficiency, restores instant throttle response, and provides a cleaner, simplified setup for off-road and race builds.
Key Features
- Keeps spool crisp through a 4" pipe that preserves exhaust velocity, sharpens throttle, and quiets cab drone.
- Wipes out active regens and lowers EGTs by trading the heavy DPF canister for a smooth 4" race pipe that sheds backpressure.
- Cuts carbon and coolant-leak risks by pulling the factory EGR cooler, keeping soot off the valves.
- Matches early-build trucks via precision V-band clamp geometry made for the factory downpipe layout.
FAQ
Q: Why does this kit stop at 2015.5 instead of covering all 2011–2016 LMLs?
A: GM changed the downpipe connection partway through 2015. The 2011–15.5 trucks run a V-clamp connection, and this kit is fabricated to match those early flanges.
Q: What do I gain in sound and performance over stock?
A: The 4" race pipe removes severe factory backpressure, sharply lowering EGTs under load while delivering faster spool and a clean, aggressive diesel note with minimal cab drone.
Q: How do I confirm my truck has the V-band clamp?
A: Look at the connection near the factory downpipe. Early LML trucks use a V-band clamp; some later builds use a 3-bolt flange instead.
Q: Should I go race pipe or a full 4"/5" exhaust?
A: The race pipe is the budget-friendly route for daily driving and towing, while a complete 4" or 5" DP-back exhaust is aimed at maximum airflow and higher-performance builds.
