FITMENT
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2007.5-2010 GMC Sierra 2500 3500 HD 6.6 LMM Duramax Diesel.
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2007.5-2010 Chevrolet Silverado 2500 3500 HD 6.6 LMM Duramax Diesel.
DESCRIPTION
Product Overview
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The 6.6L LMM was the first generation equipped with a factory DPF (Diesel Particulate Filter). These early emissions systems are infamous for frequent fuel-wasting regenerations, clogged DPF traps, sticky EGR valves that spike engine heat, and CCV systems that blow oily sludge into the turbo and intake manifold.
- The LMM Delete Kit with Performance Tuner completely cleans up your truck's engine bay and underbody. The pre-loaded tuner clears CEL error codes and disables regeneration cycles, while the mandrel-bent downpipe, EGR block-off plates, and CCV reroute eliminate backpressure, lower EGTs, and unlock smooth, reliable horsepower and torque.
Key Features
- EGR System Removal: Replaces the factory EGR valve with high-flow bypass piping and heavy-duty block-off plates, eliminating soot re-circulation and coolant leakage risks.
- Clean Intake CCV Reroute: Diverts oily crankcase vapors away from the turbo inlet and intercooler, preventing sticky sludge buildup on intake and turbo impellers.
- Upgraded Turbo Downpipe & Dual Up-Pipes: Replaces restrictive factory up-pipes and crushed downpipe with mandrel-bent SS pipes to maximize turbo spool, increase airflow, and lower EGTs.
- Pre-Loaded Performance Tuner Included: Automatically turns off EGR diagnostic trouble codes and DPF regeneration cycles without custom file flashing.
FAQ
Q: Does this kit include the underbody exhaust pipe (CAT/DPF delete pipe)?
A: No. This kit focuses on engine bay and turbo performance hardware (Downpipe, Dual Up-Pipes, EGR Delete, and CCV Reroute). It connects directly to exhaust system at the downpipe exit.
Q: Why are upgraded Dual Up-Pipes and a Turbo Downpipe included in this kit?
A: Factory Duramax LMM downpipes and up-pipes feature restrictive crimps and small diameters that bottle up exhaust gases behind the turbo. Upgrading both up-pipes and the downpipe reduces backpressure, allowing turbo to spool up much faster while dropping EGTs.
Q: What is the main benefit of performing both the EGR delete and CCV reroute at the same time?
A: Factory EGR dumps dry carbon soot into the intake, while the CCV system sprays wet oil vapor. When combined, they form a thick, sticky sludge that chokes intake valves and turbo vanes. Doing both keeps your intake system completely clean and dry.
Q: Do I need to pull the engine to install the dual up-pipes and turbo downpipe?
A: No, engine removal is not required. However, because working space behind the firewall and turbo housing is tight, using standard hand tools and removing the inner fender liner is recommended for easier bolt access.
