Description
The aFe Power ATLAS 4-Inch Aluminized Steel DPF-Back Exhaust System is engineered to deliver enhanced exhaust flow, aggressive styling, and OE-quality fitment for 2017–2019 GM 2500HD and 3500HD trucks equipped with the 6.6L L5P Duramax diesel engine.
Constructed from 4-inch mandrel-bent aluminized steel tubing, this DPF-back exhaust system is designed to improve exhaust efficiency by reducing restriction and turbulence. Smooth-radius bends promote maximum flow, helping to increase horsepower and torque while lowering exhaust gas temperatures (EGTs)—all without affecting emissions equipment.
This system converts the factory single exhaust into a bold dual rear side-exit configuration, delivering a more aggressive appearance and exhaust tone. Installation is straightforward and hassle-free thanks to OE-style bayonet hangers, high-quality band clamps, and the use of all factory mounting locations. A bolt-on bracket is included to properly support the driver-side tailpipe, ensuring long-term durability and alignment.
Finishing off the system are dual 5-inch polished 304 stainless steel clamp-on tips, each featuring a black laser-cut stainless steel aFe POWER badge for a clean, aggressive look. Despite its dual-exit design, the exhaust system retains the factory spare tire location, eliminating the need for relocation.
Proudly engineered and manufactured in Corona, California, the ATLAS exhaust system offers the ideal balance of performance, fitment, durability, and value for Duramax owners seeking an upgrade without compromise.
Key Features
-
4" mandrel-bent aluminized steel tubing for maximum exhaust flow
-
DPF-back design – no emissions equipment removed
-
Converts factory single exhaust to dual rear side exit
-
Dual 5" polished 304 stainless steel tips with laser-cut aFe POWER badges
-
OE-style bayonet hangers for secure, long-lasting fitment
-
High-quality band clamps for leak-free connections
-
Utilizes all factory mounting points
-
Spare tire compatible – no relocation required
-
Designed and manufactured in Corona, California
Fitment
Vehicle Applications:
-
2017–2019 Chevrolet Silverado 2500 HD | 6.6L L5P Duramax Diesel
-
2017–2019 Chevrolet Silverado 3500 HD | 6.6L L5P Duramax Diesel
-
2017–2019 GMC Sierra 2500 HD | 6.6L L5P Duramax Diesel
-
2017–2019 GMC Sierra 3500 HD | 6.6L L5P Duramax Diesel
Wheelbase Compatibility:
-
Crew Cab / Short Bed – 153.7" Wheelbase
-
Crew Cab / Long Bed – 167.7" Wheelbase
Notes:
-
Cutting may be required for certain cab configurations
-
Does not fit Cab & Chassis or 5th-wheel package models
Emissions Disclaimer
-
DPF-back system
-
No CARB EO# required
