aFe Large Bore 4in Stainless Steel Down-Pipe Back Exhaust System w/Dual Polish Tips Ford Diesel Trucks 17-18 V8-6.7L (td) - 49-43097-P

This Large Bore-HD exhaust system is 100% hand MIG-welded and Constructed from 4" mandrel-bent 409 stainless steel tubing for maximum flow. The smooth transition bends allow for low turbulence, increasing horsepower, torque and lowering EGT's. A mitered merge collector is also incorporated to eliminate dead space that can cause turbulence and hinder flow. This system uses all factory mounting locations providing stability. Includes OE-style bayonet hangers which 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. Includes additional hanger bracket for driver-side mount. No cutting required.