i have this on my jeep: Dynomax® Ultra Flo Evolution Competition Cat-Back Exhaust in Stainless Steel. I had it before i installed the turbo system. I like it and it sounds great. Eddie from Wayalife has a video of his Jeep (Rubicat) with a view from inside as well as outside. http://www.youtube.com/watch?v=QPe0O9TPfj4