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
- Preserves exhaust velocity through a 4" pipe that quickens turbo spool and sharpens throttle response.
- Deletes the DPF and CAT canisters for a 4" race pipe that sheds backpressure and ends fuel-draining regens.
- Removes the EGR valve and cooler so soot stays off the intake and coolant leaks become a non-issue.
- Bolts up to early-build trucks with precision V-band clamp geometry made for the factory downpipe layout.
FAQ
Q: Why is this kit for 2011–2015.5 only?
A: GM switched the downpipe connection partway through 2015. The 2011–15.5 trucks use a V-clamp, and this kit is fabricated to match those early flanges.
Q: What do I gain in sound and performance?
A: The 4" race pipe removes severe factory backpressure, sharply lowering EGTs under load while unlocking faster spool and a clean, aggressive diesel note with minimal drone.
Q: How do I know if my truck has the V-band clamp?
A: Check the connection near the factory downpipe. Early LML trucks use a V-band clamp; some later builds use a 3-bolt flange.
Q: How do I protect the open factory wiring connectors after a DPF delete?
A: Since removing the DPF leaves the original EGT and NOx sensors unused, disconnect them and secure the exposed vehicle harness. Installing a protective harness plug kit seals the open plugs against water, dirt, and road corrosion, keeping your factory electronics safe for the long haul.
