I have a gt so on mine I do not have that option. you can tune your car for the steeda cai as it is an option in the cai menu. you can change wheel sizes, gears, throttle body, headers, cams and other stuff. why do you need to take it to a shop to change the pulley? take the belt off, change pulley and put belt back on, that simple. the 3015 can also hold 5 custom tunes I think.