How loud is the supercharger system?
Almost imperceptible. At full tilt there is a slight whistling/whooshing sound generated by the Rotrex, but since there are no gears spinning, there is no whine. The belt cannot be detected, and the only other sounds present are the short pssst of the blow-off valve when letting off the throttle and the sound of air being bypassed through the valve. If you like stealth, this is the system for you.
