aFe Large Bore 4in Stainless Steel Down-Pipe Back Exhaust System w/o Tip GM Diesel Trucks 17-18 V8-6.6L (td) L5P - 49-44090

This Large Bore-HD exhaust system is constructed of 4" mandrel-bent 409 stainless steel tubing for maximum flow. Smooth transition bends allow for low turbulence, increasing horsepower, torque and throttle response. Features OE-style bayonet hangers to maintain stability during high-rev vibration and high-temp conditions. Provides hassle-free installation.