but I think you have to have EVERYTHING changed over. Like for instance, If I were to get a 5th gen Si brake conversion, its illegal for STS, but if I were to get Si brakes, motor and tranny, swaybars etc, then it'd be OK. Do you actually have a copy of the book? I lost mine, but I remember it was very picky about that kinda stuff. Of course local tech inspectors wont hold you to the letter of the rules unless youre winning a lot (which is exactly why they allow me to have the afore mentioned illegal brake swap in STS h: )