The entire purpose of this exhaust must be the one thing they do here in this video: spin it around stupidly and blow out people's ear drums. Why else would you fix such a massive exhaust add on to a Kawasaki Ninja?

The entire purpose of this exhaust must be the one thing they do here in this video: spin it around stupidly and blow out people's ear drums. Why else would you fix such a massive exhaust add on to a Kawasaki Ninja?