Description
Large Bore-HD 5" 409 Stainless Steel DPF-Back Exhaust System
2007–2010 Chevrolet Silverado & GMC Sierra 2500HD / 3500HD 6.6L LMM Duramax
Upgrade your 2007–2010 LMM Duramax-powered Silverado or Sierra HD with the aFe POWER Large Bore-HD 5" DPF-Back Exhaust System, engineered for increased exhaust flow, reduced exhaust gas temperatures (EGTs), and long-term durability. This system delivers the ideal balance of performance, fit, sound, and value while retaining factory emissions equipment.
5" Mandrel-Bent 409 Stainless Steel Construction
This DPF-back exhaust system is constructed from 5-inch mandrel-bent 409 stainless steel tubing, providing maximum exhaust flow and excellent corrosion resistance. Smooth, continuous bends reduce turbulence and backpressure, improving horsepower, torque, and overall exhaust efficiency while helping to lower EGTs—especially under towing or heavy-load conditions.
OE-Style Fit & Premium Hardware
Designed to utilize all factory mounting locations, this system features OE-style bayonet hangers to maintain proper pipe alignment during high vibration and extreme heat cycles. High-quality OE-style flanges and heavy-duty band clamps provide a complete 360-degree sealing surface, eliminating leak paths and ensuring long-term reliability.
Hassle-Free Installation
The Large Bore-HD exhaust is a direct bolt-on system that requires no cutting or modifications. All necessary hardware is included for a fast, straightforward installation using factory mounting points.
High-Luster Polished 6" Stainless Steel Tip
Finishing off the system is a massive 6-inch diameter polished 304 stainless steel slash-cut exhaust tip for a bold, aggressive appearance. The tip features a laser-cut stainless steel aFe POWER badge and includes a drain port on the underside to help prevent moisture buildup, rust, and corrosion.
Performance Benefits
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Increased exhaust flow
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Reduced backpressure
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Lower exhaust gas temperatures (EGTs)
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Improved throttle response and efficiency
Additional Information
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Emissions Disclaimer: This product does not require a CARB EO#.
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Manufacturing: Engineered and manufactured in Corona, California, USA.
The Large Bore-HD 5" DPF-Back Exhaust System is the perfect upgrade for LMM Duramax owners looking for strong performance gains, OE-quality fitment, and aggressive styling—all without compromising emissions compliance.
