Description
Upgrade the look, sound, and performance of your LML Duramax with the ATLAS 4-Inch Aluminized Steel DPF-Back Exhaust System from aFe Power. Engineered for durability, precision fitment, and enhanced exhaust flow, this system delivers an aggressive dual-exit appearance while maintaining OE-level reliability.
Constructed from 4-inch mandrel-bent aluminized steel tubing, this DPF-back exhaust is designed to maximize exhaust flow while minimizing turbulence. Smooth-radius bends improve airflow efficiency, helping to increase horsepower and torque while reducing exhaust gas temperatures (EGTs). The system utilizes high-quality band clamps and OE-style bayonet hangers, ensuring a secure, rattle-free fit even under extreme heat and vibration.
Designed as a single-to-dual exhaust conversion, this system transforms the factory single-exit configuration into a bold dual-exit layout without sacrificing practicality. It retains the factory spare tire location and uses all original mounting points, eliminating the need for cutting, welding, or permanent modifications. A bolt-on bracket is included to properly support the driver-side tailpipe for long-term stability.
Finishing the system are dual massive 6-inch high-temperature black powder-coated 304 stainless steel exhaust tips, each featuring a drain port to reduce moisture buildup and corrosion. Laser-cut stainless steel aFe Power logo badges are riveted to each tip, adding a premium and aggressive visual touch.
Proudly engineered and manufactured in Corona, California, ATLAS exhaust systems offer an ideal balance of performance, fit, sound, and value—making them a perfect upgrade for Duramax owners seeking quality and style without compromise.
Key Features
-
4" mandrel-bent aluminized steel tubing for improved flow
-
DPF-back design for emissions-compliant performance
-
Single-to-dual exhaust conversion
-
OE-style bayonet hangers for factory-style fit and durability
-
High-quality band clamps for easy, secure installation
-
Dual 6" black powder-coated 304 stainless steel tips
-
Laser-cut stainless steel aFe Power logo plates
-
Retains factory spare tire location
-
No cutting or modification required
Fitment
2011–2016 Chevrolet Silverado 2500HD / 3500HD
2011–2016 GMC Sierra 2500HD / 3500HD
-
6.6L LML Duramax Diesel V8
Fitment Note:
Does not fit 2016 3500HD models equipped with a NOX sensor.
Emissions Disclaimer
-
DPF-back system
-
CARB EO not required
