I have one. It is awesome. The power increase is outstanding from low rpm all the way to the top. My buddy rode mine back to back with his stocker, he then ordered up a prescription for himself. It fits like stock, perfect. It is just a tad louder than stock with a sharper tone to it. I have spoken with the Dubach's and they are without a doubt the friendliest aftermarket company I've ever dealt with. Buy it, buy it now.........