If you're looking to boost performance and get the most out of your Duramax engine, the AFE 49-04081 Atlas 5 Inch Filter-Back Exhaust System is the perfect choice. This system features 5" mandrel-bent aluminized steel tubing for maximum flow, and includes high quality band clamps and a 304 stainless steel tip. It's also super easy to install, using all factory mounting locations, so you can get back on the road in no time.