GM Duramax DPSS-GM-11 6.6L Cat & DPF Delete Pipe, 304 Stainless Steel - (2011-2015)!

Free up exhaust flow and support off-road performance. This 4” Stainless DPF Delete Pipe is built for 2011–2015 Chevrolet Silverado and GMC Sierra 2500/3500HD trucks equipped with the 6.6L Duramax. Designed for competition and off-road applications, it replaces the factory catalytic converter and DPF assembly to reduce restriction and improve exhaust flow.

For off-road/competition use only. Race tuning is required.

The factory DPF and catalytic converter system can create exhaust backpressure that limits performance potential. This straight-through 4” stainless pipe removes those components to support smoother exhaust flow and reduced exhaust gas temperatures (EGTs) in properly tuned applications. Built with OE-style hangers, it provides secure mounting once installed.

Vehicle Fitment

2011 Chevrolet Silverado 2500HD / 3500HD – 6.6L Duramax

2011 GMC Sierra 2500HD / 3500HD – 6.6L Duramax

2012 Chevrolet Silverado 2500HD / 3500HD – 6.6L Duramax

2012 GMC Sierra 2500HD / 3500HD – 6.6L Duramax

2013 Chevrolet Silverado 2500HD / 3500HD – 6.6L Duramax

2013 GMC Sierra 2500HD / 3500HD – 6.6L Duramax

2014 Chevrolet Silverado 2500HD / 3500HD – 6.6L Duramax

2014 GMC Sierra 2500HD / 3500HD – 6.6L Duramax

2015 Chevrolet Silverado 2500HD / 3500HD – 6.6L Duramax (except late 2015 3-bolt flange models)

2015 GMC Sierra 2500HD / 3500HD – 6.6L Duramax (except late 2015 3-bolt flange models)

Not compatible with Cab & Chassis models.

Technical Specifications

Product Type DPF Delete Pipe

Tubing Diameter 4”

Material Stainless Steel

Design Straight Pipe, Bung-Free

Mounting OE-Style Hangers

Application Off-Road / Competition Use Only

Tuning Requirement Race Tuning Required

Optional Add-On 4” Muffler (Sold Separately)

What’s Included

4” stainless steel DPF delete pipe

OE-style hangers

Features

Replaces factory catalytic converter and DPF assembly

4” stainless construction for long-term durability

Straight-through design for reduced exhaust restriction

Bung-free layout for maximum flow in race applications

Factory-style hangers for secure alignment

Benefits

Supports increased horsepower and torque in tuned setups

Helps reduce backpressure and lower EGTs

Improves throttle response in performance applications

Durable stainless design built for demanding use

Direct replacement for restrictive OEM components

Installation Notes

Requires cutting/modification of the factory exhaust system.

Professional race tuning is mandatory to prevent fault codes.

Optional 4” muffler available for sound control.

Professional installation recommended.

Verify local laws and regulations before purchasing.