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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2007.5–2010 Chevy Silverado and GMC Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax LMM Turbo Diesel are known for strong towing capability. However, factory components such as restrictive exhaust piping, aging up-pipes, EGR systems, and CCV routing can limit airflow, increase heat, and contribute to long-term maintenance concerns.
- The Duramax LMM Package includes a pre-loaded tuner, 3" high-flow downpipe, upgraded high-flow up-pipes, EGR delete kit, and CCV reroute system. Designed to improve exhaust flow, reduce intake contamination, and enhance turbo response for modified LMM Duramax applications.
Key Features
- Upgraded Dual Up-Pipes: Replaces restrictive factory up-pipes with high-flow mandrel-bent pipes to improve exhaust flow, reduce heat stress, and support better turbo performance.
- High-Flow 3" Downpipe: Replaces the restrictive factory downpipe to reduce exhaust backpressure, improve turbo response, and support lower EGTs.
- Full EGR & CCV Reroute Protection: Reduces exhaust soot recirculation and redirects crankcase vapors away from the intake system to help keep components cleaner.
- 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: What is the advantage of replacing the factory downpipe on an LMM Duramax?
A: The factory LMM downpipe uses a flattened design to clear the firewall, which restricts exhaust flow behind the turbo. A smooth 3" mandrel-bent downpipe reduces exhaust restriction, improves turbo response, and supports better exhaust flow.
Q: Why should I replace the factory up-pipes on my LMM Duramax?
A: The factory LMM up-pipes use restrictive bellows that can crack under high exhaust temperatures, causing exhaust leaks and reduced turbo efficiency. Upgraded high-flow stainless steel up-pipes improve durability, reduce leak risks, and provide better exhaust flow to the turbocharger.
Q: Why combine EGR delete and CCV reroute together?
A: The EGR delete reduces exhaust soot entering the intake system, while the CCV reroute reduces oil vapor contamination. Together, they help maintain a cleaner intake system and improve airflow efficiency.
Q: Which exhaust size is recommended for a stock turbo LMM Duramax?
A: For most stock turbo and daily-driven LMM Duramax trucks, a 4" exhaust provides excellent airflow and drivability. A 5" system is recommended for trucks with upgraded turbos, higher horsepower builds, or frequent heavy towing.
