there is not a supercharger out for the i4 and dont count on one coming out for it. there was a guy that custom fit one on. all i know is that he had a lot of custom stuff done. like cutting away the firewall which is too much work than its worth. it can be done but in my opinion its pointless. you could always go with a turbo. i am making 221hp/238ft/lbs on 10lbs of boost on a stock F23. it holds its own with a lot of cars. especially for a little 4banger family car. i would also like some low end power. but from 4500 in first it just gets up and goes. if you cant wait the .01 seconds to get there then i cant help you. there is some turbo lag. but it will also put you in your seat all the way to 130