Trucktok 2011-2015.5 6.6L Duramax LML 5" DP-Back DPF delete Pipe & EGR Cooler 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 5" 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 5" 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 5" full 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: What is the main difference between a 4" race pipe and this full DP-Back system?

A: Unlike a 4" mid-pipe replacement, this 5" DP-Back system replaces the full exhaust from downpipe to tailpipe. The larger 5" diameter maximizes airflow and delivers a deeper, thunderous diesel tone.

Q: Does a 5" straight pipe system increase cabin drone compared to a 4" system?

A: Yes. Because this system features a 5" straight-pipe design without a muffler, exterior exhaust volume will be significantly louder and you will experience noticeable cabin drone under heavy throttle or towing loads. If you prefer a quieter cabin, consider 4" exhaust pipe.

Q: Which Turbo Downpipe works best with this 5" system?

A: GM changed the downpipe flange mid-2015, so match your build date: 11–15.5 models require the V-band flange downpipe, while 15.5–16 models use the  3-bolt flange downpipe to connect directly to their corresponding race pipes.

Q: How do the EGR Delete and CCV Reroute work together to protect my engine?

A: Stock CCV oil mist mixes with EGR soot like glue and powder, forming thick sludge in your intake. Removing the EGR stops the soot and rerouting the CCV stops the oil—keeping your intake tract dry and clean.