Made of 100% T-304 stainless steel, this exhaust is a complete cat-back solution for your M5, and comes complete with rear muffler sections and the X-Pipe section. Transform the sound of your V10 engines exhaust note a light whisper, to a refined growl that better suits the M5's personality. Installation requires some cutting of the factory system. Installation instructions included. This exhaust comes with Borla's 1,000,000 mile warranty.