I bought the exhaust kit from California Mustang (
http://www.cal-mustang.com ), which included the GT take-off exhaust, the H-pipe, and all the hangers and hardware. The bumper came from MPS (
http://www.stangparts.com ). Luckily, I live in Atlanta, so I was able to pick up the bumper myself from MPS without having it shipped. You could also buy the exhaust and bumper kit from MPS and get just the H-pipe from Cal Mustang, however, the MPS kit does not include the hangers -- you have to pay extra for them. I would recommend the Cal Mustang kit for the exhaust and the bumper from MPS. The price will be about the same in the long run.