DPF/EGR Delete Kit for 2011-2016 LML 6.6L Duramax

Fitment

• 2011-2015 Chevy / GMC Duramax Diesel LML. Silverado and Sierra pickup trucks. 
• 2015.5-2016 Chevy / GMC Duramax Diesel LML. Silverado and Sierra pickup trucks. 

Short Description

Unlock the true potential of your 2011-2016 LML 6.6L Duramax. This DPF/EGR delete kit eliminates restrictive DPF and EGR systems, delivering significant gains in horsepower, torque, and fuel economy while ensuring a cleaner, more efficient engine.

Key Features

• Significant Performance Gains: Experience a dramatic increase in horsepower and torque, along with improved throttle response and elimination of turbo lag.

• Enhanced Fuel Economy: By removing the restrictive exhaust filtration and stopping the fuel-intensive regeneration cycles, you can see MPG improvements of 2-5 MPG.

• Improved Engine Longevity: Eliminates EGR soot and carbon recirculation, reducing carbon buildup on intake valves and pistons. Lowers Exhaust Gas Temperatures (EGTs) for a healthier, longer-lasting engine.

• Premium Construction: All pipes and components are constructed from heavy-duty, T409 stainless steel for superior corrosion resistance and durability.

• Simplified Maintenance: Drastically reduces the cost and complexity of future maintenance by removing the most expensive and failure-prone parts of the emissions system.

• Tuner Required for Installation: Installing a LML 6.6L Duramx delete pipe requires more than just swapping out hardware. When removing of the DPF, CAT, SCR, and/or DOC involves removing and eliminating emission related sensors. A DPF delete capable tuner is required to prevent any check engine light or diagnostic trouble codes from setting.

How to Choose a DPF Delete?

4” vs 5” Straight Pipe Comparison

• 4-inch Straight Pipe: Produces a tighter, raspier exhaust note—especially noticeable at lower RPMs. Ideal for daily driving or mildly tuned trucks where excessive drone is undesirable.
• 5-inch Straight Pipe: Delivers a deeper, more refined tone with less high-pitch resonance. Better suited for high-output builds and towing applications, where improved exhaust flow is beneficial.

Driver Feedback Summary

• The 4" pipe works well for stock or lightly modified trucks and a quieter cabin.
• The 5" pipe is perfect for aggressive builds, deep-tone enthusiasts, and those maximizing exhaust performance.

Types of DPF Delete Kits

DPF Race Delete

• Removes only the DPF (retains stock downpipe)
• Offers minimal performance gains but is the most budget-friendly
• Best for cost-conscious users or avoiding emissions testing

Downpipe-Back Delete

• Replaces the exhaust from the turbo downpipe back
• Improves mid-range power and throttle response
• Ideal for street builds using the stock turbo

Turbo-Back Delete

• Full system replacement starting from the turbo outlet
• Includes a high-flow downpipe for maximum efficiency
• Reduces turbo lag and boosts top-end power
• Top choice for tuned or high-performance engines

Dual Exit (5" only)

• Splits into dual exhaust paths
• Enhances cooling and flow for extreme conditions
• Commonly used in heavy towing or competition setups

Muffler vs. No Muffler

With Muffler

• Reduces exhaust noise for daily driving
• Slight power restriction (~5–10 HP)
• More likely to comply with local noise regulations

Straight Pipe (No Muffler)

• Loud, aggressive exhaust tone
• Unrestricted flow for maximum horsepower
• Often not street-legal due to noise and emissions rules
• Intended for off-road or race use only