When I first installed the TOR's, the Rocket was loud, raunchy, and blew flames out the exhaust. It scared the hell out of my 100# bulldog. I took it into work the next day, and the roar of the bike and explosions out the rear when decelerating caused much neck snappping from pedestrians and stares from commuters around me. The performance was amazingly enhanced to match modified two stroke Kawasaki triple cafe racers from the '70s (I know, I owned one). It also smelled to high heaven of unburnt fuel.
On the way home from work I stopped by the local triumph dealer to retune the ECU to match the TOR's. This actually detuned the bike from blowing flames and explosions to popping, eliminate the unburnt fuel smell, and god knows how much horsepower.
It's slightly more peppy now, louder but not obnoxious, but **** I miss that horsepower rush before the detune.