Product description
Large Bore-HD 4 IN 409 Stainless Steel DPF-Back Exhaust w/Dual Polished Tips GM Diesel Trucks 17-19 V8-6.6L (td) L5P
Large Bore-HD 4 IN 409 Stainless Steel DPF-Back Exhaust w/Dual Polished Tips
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Supplier details checked 2026-09-23 · Test catalog
Large Bore-HD 4 IN 409 Stainless Steel DPF-Back Exhaust w/Dual Polished Tips GM Diesel Trucks 17-19 V8-6.6L (td) L5P
Large Bore-HD 4 IN 409 Stainless Steel DPF-Back Exhaust w/Dual Polished Tips
Tips w/Laser Cut Stainless Steel aFe Power Plate
Mandrel Bent Stainless Steel Tubing
Quick Hassle Free Installation
Factory Mounting Locations
High Quality Band Clamps
OE Style Bayonet Hangers
Dual Rear Side Exit
aFe Large Bore-HD 4in 409-SS DPF-Back Exhaust w/Dual Polished Tips 2017 GM Duramax V8-6.6L (td) L5P
Large Bore-HD DPF-Back Exhaust System
DPF-Back Exhaust
Interested in a new exhaust system for your L5P Duramax? Check out the Large Bore-HD dual DPF-Back exhaust system by aFe. This system is constructed from 4" mandrel-bent 409 stainless steel tubing and uses high quality band clamps and OE-style bayonet hangers. This unit uses all factory mounting locations and comes with a bolt-on bracket that supports the driver side tailpipe. This provides for a quick, hassle-free installation with no modification necessary. Also included in this exhaust system are dual massive 6" high temp black powder-coated stainless steel tips with a laser-cut stainless steel aFe power badges. Large Bore-HD exhaust systems are the perfect combination of performance, fit and value. 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. Polished Tips: Finishing off the exhaust are 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