Installed on 2011 Vaquero 1700. They are louder than I expected, but not in a trashy Hard Krome straight pipe way. Fit is SUPERB, and they look GREAT. Twice as loud as stock mufflers, you will definitely want to get the Dynojet PC5 to go with. Best fit of any aftermarket mufflers on any bike I have had. If you have a Kawi 1700, order up some extra muffler gaskets before you tear into it, seems most people end up needing one for the left pipe, but the one for the right side was fine.