i got my powerpro installed and have close to 100 miles on it. easy install, wire routing requires a little imagination. no tank removal required. just take the two acorn nuts off and raise the rear about an inch with a block of wood. the bike definately has more torque and throttle response from idle on up. it's easier to take off from a dead stop, smoother at low rpm's., and oem exaust slightly throatier. the differences are subtle, but they are an improvement over stock. the bike ran good stock, better than most big v-twins. this just puts the icing on the cake.