4" DPF/DEF/EGR/CCV Delete 2015.5-2016 6.6L LML Duramax All-in-One Kit

FITMENT

• 2015.5-2016 6.6L Silverado & Sierra Duramax 2500HD/3500HD LML engine models with the 3-bolt flange.
• Does NOT Fit 2011-2015.5 model with the V-Band Clamp style. 
• Please physically inspect underneath truck to verify your turbo discharge style before purchasing!

DESCRIPTION

Product Overview

• The factory emissions system on 6.6L Duramax LML engines can create multiple airflow and contamination concerns. The DPF system adds exhaust restriction and heat management demands, while the EGR system recirculates soot into the intake tract.
• The Duramax LML All-in-One Package designed to improve exhaust flow, reduce factory restrictions, and support better throttle response and reliability for modified LML 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: What factory emissions components does this kit address?

A:  This package addresses the major LML emissions components, including the DPF, DEF/SCR exhaust system, EGR valve & cooler, and CCV system. It is designed to reduce factory exhaust restrictions and intake contamination.

Q: Why should I remove the EGR system on my LML Duramax?

A:  The factory EGR system recirculates exhaust gases into the intake, which can contribute to soot buildup over time. An EGR delete kit helps keep the intake system cleaner and improves airflow efficiency.

Q: What is the difference between a 4" race pipe and a full exhaust system?

A:  4" DPF race pipe replaces the factory DPF/SCR section while keeping the remaining exhaust components. A full exhaust system replaces more of the factory exhaust path for increased airflow and a deeper exhaust tone.

Q: What is the difference between 2011–2015 and 2015.5–2016 LML exhaust systems?

A:  The main difference is the exhaust connection style. Early 2011–2015 models and later 2015.5–2016 models may use different flange configurations, so verify your factory connection before ordering.