Description
Large Bore-HD 5" 409 Stainless Steel DPF-Back Exhaust System
2020–2023 GM HD Trucks | 6.6L Duramax Diesel
The Large Bore-HD 5" DPF-Back Exhaust System is engineered to enhance exhaust flow, durability, and appearance for 2020–2023 Chevrolet Silverado HD and GMC Sierra HD trucks equipped with the 6.6L Duramax diesel engine. Designed for heavy-duty performance and long-term reliability, this system delivers improved exhaust efficiency while maintaining compatibility with factory emissions components.
Constructed from mandrel-bent 5-inch 409 stainless steel tubing, this DPF-back exhaust provides maximum strength, corrosion resistance, and unrestricted exhaust flow. Precision CAD engineering ensures an exact, factory-style fit, while race-proven MIG welds add exceptional durability under demanding towing and driving conditions.
Key Features & Benefits
-
5" Mandrel-Bent 409 Stainless Steel Construction:
Large-diameter tubing improves exhaust flow while offering excellent resistance to heat and corrosion, ideal for heavy-duty diesel applications. -
6" Polished 304 Stainless Steel Exhaust Tip:
Finished with a 6-inch diameter polished intercooled clamp-on exhaust tip, featuring a riveted aFe POWER logo plate for a bold, aggressive appearance. -
DPF-Back Configuration:
Retains factory emissions equipment while enhancing sound, performance, and exhaust flow behind the DPF. -
Factory-Style Hangers:
Utilizes OEM-style hangers to mount directly to factory locations, ensuring proper alignment and a secure fit. -
CAD-Designed Precision Fitment:
Computer-aided design ensures consistent clearances and high-tolerance factory-quality installation. -
100% MIG-Welded Construction:
Race-proven welds provide superior strength, durability, and long-term reliability. -
Hassle-Free Installation:
All required hardware is included. Some cutting is required—please refer to the installation instructions for details.
Wheelbase Fitment
-
Double Cab / Short Bed: 149.4" Wheelbase
-
Crew Cab / Short Bed: 158.9" Wheelbase
-
Double Cab / Long Bed: 162.4" Wheelbase
-
Crew Cab / Long Bed: 172" Wheelbase
Made in the USA
All aFe POWER exhaust systems are proudly engineered and manufactured in Corona, California, ensuring premium quality and performance standards.
Emissions Disclaimer
This product does not require a CARB EO# and does not affect emissions equipment.
Vehicle Applications
Chevrolet
-
2020–2023 Silverado 2500 HD – 6.6L Duramax Diesel
-
2020–2023 Silverado 3500 HD – 6.6L Duramax Diesel
GMC
-
2020–2023 Sierra 2500 HD – 6.6L Duramax Diesel
-
2020–2023 Sierra 3500 HD – 6.6L Duramax Diesel
