FITMENT
-
2007.5-2010 6.6L GMC Sierra 2500 3500 HD LMM Duramax Diesel.
-
2007.5-2010 6.6L Chevrolet Silverado 2500 3500 HD LMM Duramax Diesel.
DESCRIPTION
Product Overview
-
2007.5–2010 6.6L LMM trucks deliver strong towing performance. However, factory emissions components—including the DPF, EGR valve/cooler, and CCV system—can restrict airflow, increase exhaust heat, and contribute to soot and oil buildup over time.
- The LMM 4" All-in-One Package combines a Mini Maxx V2 tuner, 4" Dp-back exhaust, high-flow EGR delete kit with intake, and CCV reroute kit into one complete solution. Designed to improve exhaust flow, reduce intake contamination, and enhance throttle response for modified LMM Duramax applications.
Key Features
- High-Flow 4" Exhaust System: Replaces restrictive factory DPF exhaust components with mandrel-bent 4" piping and OEM-style hangers for improved airflow and easy installation.
- EGR Delete with High-Flow Intake: Removes the factory EGR cooler and upgrades restrictive intake components to support cleaner airflow into the engine.
- CCV Reroute System: Redirects crankcase vapors away from the intake tract, helping reduce oil contamination in turbo and intercooler components.
- Improved Performance & Efficiency: Reduces factory airflow restrictions, improves throttle response, and supports better towing performance for modified LMM Duramax applications.
- Pre-Loaded Mini Maxx V2 Tuner: Includes pre-configured tuning support for modified configurations, helping manage related diagnostics and optimize engine parameters after hardware upgrades.
FAQ
Q: How much fuel economy improvement can I expect after installing this kit?
A: Most LMM owners report an increase of 2 to 4 MPG. This improvement comes from eliminating the restrictive DPF filter and completely ending the fuel-heavy "active regen" cycles that spray raw diesel into the exhaust every few hundred miles.
Q: What is the benefit of including the High-Flow Intake Elbow Tube with the EGR kit?
A: The factory LMM intake bridge has restrictive bends designed to accommodate the bulky EGR valve. The included high-flow intake elbow smooths out incoming airflow directly into the manifold, resulting in noticeably faster turbo spool and lower EGTs under load.
Q: Will I need any custom tuning, or is the Mini Maxx V2 tuner fully ready out of the box?
A: The included Mini Maxx V2 tuner comes pre-loaded with dedicated 2007.5–2010 LMM Duramax calibration files. No additional tuning device is required for the included setup, and it provides calibration support for modified DPF and EGR configurations.**
Q: Does the 2007.5–2010 GM Duramax LMM engine use DEF fluid?
A: No. The 6.6L Duramax LMM was built before GM introduced DEF/SCR systems. This kit addresses the DPF, EGR, and CCV systems only—no DEF tank, fluid, or components are involved.
