So you’re looking for a new DPF-Back exhaust for your GM Duramax? You’re in luck because you’ve stumbled upon the perfect combination of performance, fit and value for your GM Duramax. aFe’s Large Bore-HD 4” 409 Stainless Steel DPF-Back Exhaust System is constructed from 4" mandrel-bent 409 stainless steel tubing and uses high quality band clamps and OE-style bayonet hangers. By using all factory mounting locations and a bolt-on bracket that supports the driver side tailpipe, this provides for a quick, hassle-free installation with no modification necessary. Other features and benefits include:

Single To Dual Exhaust Conversion:

This exhaust is designed to convert the standard single exhaust into an aggressive dual exhaust.

Fits With Spare Tire:

This exhaust system fits perfectly without relocating the spare tire.

OE Fit:

OE-style bayonet hangers are used to maintain a stable pipe location during high vibration and high heat conditions. The bayonet tip holds the hanger bushing in place for an OE-style fit that does not change with time.

Flow and Performance:

This Large Bore-HD exhaust system is constructed from 4" mandrel-bent stainless steel tubing for maximum flow. Smooth transition bends allow for low turbulence, increasing horsepower, torque and lowering EGT’s.

Your choice in tip finish:

• 6” Polished Tips: Dual high luster, polished 304 stainless steel slash-cut tips. This tip features a laser-cut stainless steel aFe power badge for an aggressive style.
• 6” Black Tips: Dual powder-coated high temp black 304 stainless steel exhaust tips. This tip features a laser-cut stainless steel aFe power badge for an aggressive style.