He is completely stock. I know this for sure because we are good friends. I am also completely stock. Therefore, I just need to know what RPM i need to powerbreak to. golfdude said to rev until 3000 RPM, but that sounds like a lot and im afraid the tires would just spin forever. but i will try it anyways. the only thing he has done to the GTP is that he had to replace his idler pulley because it wore his supercharger belt the wrong way and it snapped. However, the pulley is a stock replacement.