Description
aFe Large Bore-HD 5” 409 Stainless Steel DPF-Back Exhaust System
The aFe Large Bore-HD 5-inch DPF-Back Exhaust System is purpose-built for 2016 LML Duramax-equipped GM HD trucks, delivering enhanced exhaust flow, exceptional durability, and aggressive styling while retaining all factory emissions equipment. Designed for demanding diesel applications, this system offers a premium balance of performance, OE-quality fitment, and long-term reliability.
Constructed from 5-inch mandrel-bent 409 stainless steel tubing, the Large Bore-HD exhaust system significantly reduces exhaust restriction compared to the factory system. The smooth, constant-radius bends promote efficient exhaust scavenging, helping to increase horsepower and torque while reducing exhaust gas temperatures (EGTs)—ideal for towing, hauling, and high-load driving conditions.
OE-Style Fitment & Hassle-Free Installation
This DPF-back exhaust system utilizes all factory mounting locations for a straightforward, bolt-on installation with no cutting or modifications required. OE-style bayonet hangers maintain precise pipe alignment under high heat and vibration, ensuring a secure fit that does not shift over time. A high-quality stainless steel band clamp is included to provide a complete 360-degree, leak-free seal.
High-Flow Performance Design
The Large Bore-HD 5-inch stainless steel tubing is engineered for maximum exhaust flow with minimal turbulence. This design improves throttle response and overall engine efficiency while helping to lower EGTs—critical for long-term reliability in high-output diesel engines.
6" Black Intercooled Stainless Steel Exhaust Tip
Finishing the system is a massive 6-inch diameter slash-cut exhaust tip, constructed from 304 stainless steel and finished in a durable wrinkle-black powder coat. Integrated intercooling vents help reduce exhaust gas temperatures at the tailpipe, while the laser-cut stainless steel aFe POWER logo plate adds an aggressive, premium appearance.
Key Features & Benefits
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5" mandrel-bent 409 stainless steel tubing
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DPF-back design (retains factory emissions components)
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Improved exhaust flow, horsepower, torque, and reduced EGTs
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OE-style bayonet hangers for long-term fitment stability
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High-quality band clamp for a leak-free seal
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Uses all factory mounting locations for easy installation
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6" black intercooled stainless steel exhaust tip with aFe POWER badge
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Engineered and manufactured in Corona, California
Cab & Bed Fitment
Compatible with the following configurations:
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Extended Cab / Short Bed (6.6 ft) – 143.5" Wheelbase
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Crew Cab / Short Bed (6.6 ft) – 153.7" Wheelbase
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Extended Cab / Long Bed (8 ft) – 158.1" Wheelbase
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Crew Cab / Long Bed (8 ft) – 167.7" Wheelbase
⚠️ Fitment Note:
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This system only fits 2016 3500HD models equipped with a NOx sensor
Emissions Disclaimer
This product does not require a CARB EO number.
Vehicle Applications
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2016 Chevrolet Silverado 2500HD / 3500HD – 6.6L LML Duramax
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2016 GMC Sierra 2500HD / 3500HD – 6.6L LML Duramax
Upgrade your diesel truck with the aFe Large Bore-HD 5” DPF-Back Exhaust System for uncompromising stainless steel durability, improved performance, and aggressive styling built to handle heavy-duty demands.
