I just replaced the short TOR's with SS long cannons last week. WOW what a difference. I can hear the bike idle now, and it sounds great! It is very loud, bordering on obnoxious, but I love it. It's not any louder than a lot of the HD guys out there. Nice tone too. With the TOR's it purred nicely on accel, but otherwise pretty quiet, which is ok, I just prefer it louder personally. (grunt, grunt)