This is probably a common sense question, but im tryna see if I should actually break my neck trying to find a good STi for a good price. Or should I do what my mind tells me and try to upgrade certain things on a stock WRX to make it just as good as an STi. From what I read a WRX is just an STi minus some hp, and of course other performance parts. BUt basically speaking what makes an STi an STi? Is it just a matter of upgrading the turbo and other things or what?