Description
aFe Large Bore-HD 5” 409 Stainless Steel DPF-Back Exhaust System
Upgrade the performance, sound, and durability of your 2016 LML Duramax-powered GM HD truck with the aFe Large Bore-HD 5-Inch DPF-Back Exhaust System. Designed to deliver increased exhaust flow while retaining all factory emissions components, this system offers an ideal balance of power, fitment, and long-term reliability.
Constructed from 5-inch mandrel-bent 409 stainless steel tubing, the Large Bore-HD exhaust system minimizes exhaust restriction and turbulence compared to the factory system. The smooth, constant-radius bends promote efficient exhaust scavenging, helping to increase horsepower and torque while lowering exhaust gas temperatures (EGTs)—especially beneficial for towing, hauling, and high-load applications.
OE-Style Fitment & Easy 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 ensure precise pipe alignment and stability under high heat and vibration, while a high-quality stainless steel band clamp provides a complete 360-degree, leak-free seal.
High-Flow Performance Design
The 5-inch stainless steel tubing is engineered for maximum exhaust flow, reducing backpressure and improving throttle response. The mandrel-bent construction maintains consistent internal diameter throughout the system, optimizing performance and helping manage EGTs during demanding driving conditions.
6” Polished Intercooled Stainless Steel Exhaust Tip
Completing the system is a massive 6-inch diameter slash-cut exhaust tip, crafted from 304 stainless steel with a high-luster polished finish. Integrated intercooling vents help reduce exhaust gas temperatures at the tailpipe, while the laser-cut stainless steel aFe POWER logo badge adds a bold, aggressive 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 equipment
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Increased exhaust flow for improved horsepower, torque, and reduced EGTs
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OE-style bayonet hangers for secure, long-term fitment
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High-quality band clamp for a leak-free seal
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Utilizes factory mounting points for hassle-free installation
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6" polished intercooled stainless steel exhaust tip with aFe POWER badge
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Designed, 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
Enhance your diesel truck with the aFe Large Bore-HD 5” DPF-Back Exhaust System—engineered for superior flow, aggressive styling, and OEM-quality fitment you can trust.
