I'm only really concerned with changing the exhaust sound to something that would "IMHO" something that would compliment the power of this bike. I checked the least expensive options "slip-ons" and they require you to butcher/cut the stock exhaust. The others are much more expensive "$1000.00 +". I know if you lower the back pressure off any engine, it could result in a lean condition and running the valves and everything else much hotter. I don't want that. My question is, can you change the stock exhaust at all to simply augment the sound, are there other options that can do the same without changing the FAR. If I do have to change the FAR will something like a power commander do the job? Thanks for any sound suggestions.