nothing about performance parts are cost effective. You'll need the same parts (mostly) weather the air is forced from the intake side (supercharger)or forced from the exhaust side (turbo). If I was going to build a car for speed I'd go with a N/A motor and get rid of everything except the ALT. and power steering pump (cuz I'm lazy) Plus there would only be a couple of wires to hook up and you can work on the dang thing your self and they are extremely easy to tune.