Description
Large Bore-HD 4” 409 Stainless Steel DPF-Back Exhaust System – Polished Dual Tips for 2020–2025 Chevrolet & GMC Silverado/Sierra 2500-3500 HD Diesel
Upgrade your heavy-duty Duramax truck with the Large Bore-HD 4” DPF-Back Exhaust System from aFe POWER. Built for 2020–2025 Chevrolet Silverado and GMC Sierra 2500/3500 HD models with the 6.6L V8 Duramax engine, this exhaust system delivers maximum performance, aggressive sound, and premium styling.
Durable 4” 409 Stainless Steel Construction
Manufactured from 4-inch mandrel-bent 409 stainless steel tubing, this DPF-back exhaust system ensures superior strength and long-lasting durability. The integrated mitered merge collector reduces turbulence and increases exhaust velocity, producing enhanced horsepower, torque, and throttle response.
Polished Dual 5” Stainless Steel Tips
Finishing the system are dual 5-inch polished 304 stainless steel intercooled clamp-on exhaust tips, each featuring a riveted aFe POWER logo plate for a distinctive, premium appearance. The clamp-on design allows for precise alignment and a clean, aggressive look.
Precision Fit & Installation
Engineered with computer-aided design (CAD) technology, this exhaust system offers high-tolerance, factory-style fitment. Using factory-style hangers, it mounts securely to factory locations. Some cutting is required—detailed instructions are included—ensuring a smooth installation process.
Race-Proven MIG-Welded Construction
100% MIG-welded for strength and durability, this exhaust system provides a leak-free seal and withstands the extreme conditions of heavy-duty diesel performance.
Wheelbase Fitment:
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Double Cab / Short-Bed – 149.4"
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Crew Cab / Short-Bed – 158.9"
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Double Cab / Long-Bed – 162.4"
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Crew Cab / Long-Bed – 172"
Emissions Compliance:
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CARB EO# not required
Compatible Models:
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2020–2025 Chevrolet Silverado 2500/3500 HD Diesel V8-6.6L Duramax
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2020–2025 GMC Sierra 2500/3500 HD Diesel V8-6.6L Duramax
Proudly engineered and manufactured in Corona, California, the Large Bore-HD 4” DPF-back exhaust system combines high-performance engineering, aggressive styling, and durable construction for the ultimate Duramax upgrade.
