the 4-ac isnt too bad, dont expect too much from it though u wont be dissappointed with the power although thats not what its all about if u want a sprinter to go sideways in, the 4-ac has plenty of power to get the ass end out, but requires techneque(spelling) i say buy your sprinter and make the most of what u have, IMO you are better off doing the suspension before more power and get used to your car, then you will be able to slide it even better with more power...