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The aFe Large Bore-HD 4-inch 409 stainless steel DPF-back exhaust for 2017–2019 GM Duramax V8 6.6L L5P converts the factory single exhaust to a dual-exit layout and uses mandrel-bent tubing with smooth transition bends for improved flow. It mounts to factory locations with OE-style bayonet hangers, fits without relocating the spare tire, and finishes with dual 6-inch high-temp black powder-coated stainless tips and laser-cut aFe badges for an aggressive appearance.
aFe LARGE BORE-HD 4in 409-SS DPF-Back Exhaust w/Dual Black Tips 2017 GM Duramax V8-6.6L (td) L5P
