There is a dyno gain of 6 Hp which flows right through the rev range: Aprilia SL1000 Falco Exhaust System

There is a dyno gain of 6 Hp which flows right through the rev range, the change from standard muffler to a Staintune assists in the dispersment of exhaust gasses and therefore the throttle becomes a lot more responsive and mid range performance is dramatically increased. There is also no need to carry out any engine tuning or re-mapping as Staintune design their system to be pure bolt on performance with nothing else to spend.