I have the slp twins and rkt cut head on my 06 m7 with a boondocker controll box and when they are tuned right they are impressive. My buddys on ski doo 1000 and new xp get pissed when the get beat by a 700. Granted there are the ups and downs, ups being that when tuned right they flat rip you will be impressed they just keep going and going. Down side is they make alot of heat under the hood and everything gets heat soaked causing poor or inconsistant performance. Clutching these can be a little bit of a challenge as well, I ran stock cat weights and a stiff spring and could not get where it needed to be untill I changed to a different profile weight with a real light tip. If it is set up with their clutching specs you should be just fine. Run it, be patient with it and do alot of learning and you will really like it. Cooling and getting the underhood heat out will be the trick to consistant performance.