I can't see a problem with doing that.Years ago in the old country we would make parts fit all the time.Mufflers are not such a big deal,except when it comes to the name and the status of having a $2500.00 set on your bike.I have a custom exhaust..............it cost me 18 cents for a hacksaw blade.I cut my exhaust off and have not suffered any loss of power, plugs look great, bike runs fine.If you can make a tbr pipe fit onto your bike and you like it, then go for it bro!