Description
Large Bore-HD 4” 409 Stainless Steel DPF-Back Exhaust System – Chevrolet & GMC Silverado/Sierra 2500-3500 HD Diesel
Elevate your heavy-duty Duramax truck’s performance and style with the Large Bore-HD 4” 409 Stainless Steel DPF-Back Exhaust System by aFe POWER. Designed for 2020–2025 Chevrolet Silverado and GMC Sierra 2500/3500 HD models with the 6.6L V8 Duramax engine, this precision-engineered exhaust system delivers maximum flow, aggressive styling, and proven durability.
Maximum Flow & Strength
Constructed from 4-inch mandrel-bent 409 stainless steel tubing, this DPF-back exhaust system ensures superior exhaust flow and long-lasting durability. The integrated mitered merge collector reduces turbulence and increases exhaust velocity, resulting in improved horsepower, torque, and throttle response.
Aggressive Styling with Dual Black Tips
The system is finished with dual 5-inch black 304 stainless steel intercooled clamp-on exhaust tips, each featuring a riveted aFe POWER logo plate for a striking, aggressive look. The clamp-on design allows for precise alignment and a clean, custom appearance.
Hassle-Free Installation
Engineered using computer-aided design (CAD) technology, this exhaust system offers high-precision fitment with factory mounting locations. Utilizing factory-style hangers, the system mounts securely and reliably. Some cutting is required—full instructions included—making installation straightforward while ensuring a professional fit.
Race-Proven Construction
The entire system is 100% MIG-welded, providing superior strength, durability, and leak-free performance under extreme conditions.
Wheelbase Fitment:
-
Double Cab / Short-Bed – 149.4"
-
Crew Cab / Short-Bed – 158.9"
-
Double Cab / Long-Bed – 162.4"
-
Crew Cab / Long-Bed – 172"
Emissions Compliance:
-
CARB EO# not required.
Proudly engineered and manufactured in Corona, California, the aFe POWER Large Bore-HD DPF-Back Exhaust System is the ultimate solution for Duramax owners seeking enhanced performance, aggressive sound, and durable style.
Compatible Models:
-
2020–2025 Chevrolet Silverado 2500/3500 HD Diesel V8-6.6L Duramax
-
2020–2025 GMC Sierra 2500/3500 HD Diesel V8-6.6L Duramax
