they just clamp on with the original clamp (mine went on a little tight though). i like the pipes and they are loud!! i think they were easily worth the price. mine did have a bracket on the pipe for mounting that i had to cut off. hope this helps---------cliff
red and black 2003 speedmaster, AI removed, unifilter, airbox mod, khromewerks pipes, 18t, 135 mains
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