Trucktok 2011-2015.5 6.6L Duramax LML 4" DP-Back DPF delete Pipe & EGR/CC Delete Kit

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

• The factory 6.6L Duramax LML emissions system creates airflow restrictions on both the exhaust and intake sides. The DPF adds exhaust restriction and heat management demands, while the EGR and CCV systems introduce soot and oil vapor into the intake tract. Over time, these contaminants contribute to carbon buildup, reduced airflow efficiency, and increased maintenance concerns.
• The 4" DP-Back Exhaust, EGR Delete & CCV Reroute Package provides a complete airflow upgrade solution from turbo to tailpipe. helps reduce exhaust restriction, improve airflow efficiency, and maintain a cleaner intake system for LML Duramax performance applications.

Key Features

• Massive DP-Back: Replaces the entire factory exhaust from the dp-back with smooth 4" pipe—delivering maximum exhaust flow, lowest possible EGTs, and a deep, aggressive diesel tone.
  
• Reduces EGTs & Ends Active Regens: Replaces the heavy, restrictive DPF canister with a smooth 4" race pipe to eliminate primary exhaust backpressure and stop fuel-draining regenerations.
• Dual-Source Intake Protection: Removes EGR soot and reroutes CCV oil mist away from the engine—stopping carbon sludge buildup and keepin turbo, intercooler, and intake tract dry and claen.
• Saves Maximum Labor & Shop Costs: Installing all three systems at once avoids duplicate teardown shop labor around the tight rear engine compartment and chassis.

FAQ

Q: How does a Downpipe-Back system differ from a standard DPF delete race pipe?

A: A standard DPF race pipe replaces only the middle emissions canister section. This 4" DP-Back system replaces the entire exhaust tubing from the downpipe exit all the way to the rear tailpipe, eliminating all factory pinch points for maximum exhaust velocity.

Q: How do the EGR Delete and CCV Reroute work together in this kit?

A: Factory CCV oil mist and EGR soot combine like glue and powder to choke your intake with thick sludge. Deleting the EGR eliminates the soot, while rerouting the CCV eliminates the oil—keeping your entire intake system and turbo dry and clean.

Q: What is the main benefit of choosing a 4" Downpipe-Back system over a 5" system?

A: 4" system offers easier installation clearance around the frame rails and rear axle while maintaining high exhaust flow for lower EGTs. It also produces a slightly tighter, refined exhaust note with less low-frequency cab drone than a massive 5" pipe.

Q: Is custom ECM tuning required after installing this 4" complete kit?

A: Yes, mandatory. Custom tuning is required to disable EGR/DPF diagnostics in the ECM, prevent Check Engine Lights, and ensure your engine runs smoothly with optimized air-fuel parameters.