Just to let everybody know, I superchipped my Cooper already and I gained about 7HP according to the dyno test ( its reliability is questionable ). But I also felt the difference in the car. It responds better, it is a lot more quicker in lower rpm. Still not flying though. But one think I should warn everyone is that, don't mess with your redline point if you wanna chip your car because that will make your engine suffer day by day... Other then that, let me say It is nice way to tune -up your Cooper, for now.....