My 07 with the TOR can and tune is appreciably louder than stock. My dealer set up the bike, originally, with TOR tune and the stock can. I think the bike ran as well as with that set up as with the TOR can. If your not necessarily looking to make a little more noise, I'd suggest you try the TOR tune with the stock can first. That will richen up the mid range and take some of the "hunting" out of the system.