very interesting graph there...it does indeed appear that go 21 has more power then the Ninja and it is less finicky on pipes???!!! Hmm....wish I would have seen that before!! Nevertheless, I love my Ninja and if you are running one, get yourself a Nova 53 pipe, Sportworks 053 pipe, the like. From first hand experience, the JP-1 does not work as well as these on the Ninja