off topic.....but buy a dynomax super turbo.....itll quiet you down and wont kill your exhaust flow plus its cheap.....i have a dohc zc (4-2-1 dc w/testpipe & 2 1/4 exh.)....ive had every muffler you can think of (shit was bee style loud WHAAAAAAAA) and the two that were quiet yet maintained performance were the greddy sp and dynomax super turbo. you have to get offset/offset as the other style (offset/center) will kill performance for sure........HTH