it'a a custom made stainless steel pipe designed from an exhaust shop, it's from the cat back to some unknown muffler, sounds great it's real beefy, lol, i just want $80 for it lmk people, it's 2 and 1/4, only $80/obo, lmk people, great for you people that don't have a lot of cash to lay down on a real catback exhaust but you want some better performance and to upgrade from the stock exhaust and sound