4"/5" 2011-2016 LML 6.6 Duramax DPF Delete Race Pipe Exhaust Chevy GMC

2011-2016 LML DPF Delete Race Pipe Exhaust | 6.6L Chevy GMC

The Diesel Particulate Filter (DPF) reduces emissions but restricts performance. Over time, it clogs, causing poor fuel economy and costly maintenance. So unleash your 2011–2016 Chevy Silverado & GMC Sierra 2500/3500HD 6.6 Duramax's true power with this off-road DPF delete kit, which is available in 4" or 5" sizes, crafted from high-quality T409 stainless steel and comes complete with all necessary clamps and hardware for installation that can be finished in under 2 hours, with a tuner being required for use.

Key Features

• Lower exhaust backpressure
• Boost fuel economy (up to 25%)
• Increase horsepower and torque
• Reduce long-term maintenance

4″ vs 5″ Exhaust Pipe – Which One Should You Choose?

4″ Option:

• Balanced airflow
• Great for daily driving and light towing

5″ Option:

• Maximum airflow
• Ideal for heavy towing or off-road performance

Performance Benefits of Removing the DPF

• Gain up to 15–20 HP
• Improve throttle response
• Smoother exhaust flow
• Reduced turbo stress

What’s Included in the DPF Delete Kit

• DPF delete pipe (choose 4″ or 5″)
• Clamps, hangers, and mounting hardware
• Compatible with stock downpipe
• Built from corrosion-resistant T409 stainless steel

Installation

2011-2016 LML 6.6 Duramax DPF Delete Race Pipe Installation PDF

Tools Needed:

• Basic hand tools
• Optional lift for easier access

Installation Time:

• Around 1.5 to 2 hours

Important:

• Tuner required post-installation to clear error codes and optimize performance.

Legal Notice: Off-Road Use Only

This product is intended for off-road competition use only. Not legal for sale or use on pollution-controlled vehicles in any state.

Ships Fast from North America

• In stock and ready to ship
• North America warehouse
• Free standard shipping
• 12-month warranty

Fitment

• 2011–2015 Chevy Silverado & GMC Sierra 2500/3500HD (V-band clamp connection)
• 2015.5–2016 models (3-bolt flange connection)

Double-check your downpipe connection before ordering, 2015 is a split year:

• Early 2015 = V-band style
• Late 2015 (2015.5) = 3-bolt flange

FAQ

Q1: Do I need a tuner?

A1: Yes. It’s required to prevent check engine lights and ensure smooth operation.

Q2: Will this fit Cab & Chassis models?

A2: No. These models require a longer pipe. Contact us for assistance.

Q3: Is it legal to use on public roads?

A3: No. DPF delete kits are intended for off-road or racing use only.

Q4: What's the difference between DPF and DEF delete?

A4: DPF targets the filter; DEF targets the fluid system. This kit only removes the filter.

Q5: Is this kit complete, or do I need extra parts?

A5: This kit includes everything you need for installation, including the pipes, clamps, and hardware.

Q6: How do I know which connection my 2015 Duramax has?

A6: 2015 is a split year. Early 2015 models use a V-band clamp connection, while late 2015 (2015.5) models use a 3-bolt flange. Please visually check your factory downpipe connection before ordering.

Q7: How much will my fuel economy improve after the delete?

A7: By reducing exhaust backpressure and eliminating forced regeneration cycles, you can see a fuel economy boost of up to 25%, depending on your driving habits and tuning.

Q8: What material is the delete pipe made of?

A8: This DPF delete kit is constructed from T409 stainless steel, which offers excellent corrosion resistance and durability for heavy-duty use.

Q9: How long does it take to install this kit?

A9: The installation is a direct bolt-on process that typically takes around 1.5 to 2 hours using basic hand tools. A lift is optional but recommended for easier access.

Q10: Will this DPF delete kit make my Duramax louder?

A10: Yes, removing the restrictive factory DPF will give your 6.6L LML Duramax a deeper, more aggressive exhaust tone and make the turbo whistle more noticeable.