Originally posted by reuter
hmm i cant tell you whether or not it will bolt right up, but larger bore and aftermarket throttle bodies are BS 99% of the time unless your car has a good sized lift cam in it and is just starving for air. aftermarket TBs run around $2-300 and im sure a gs-r throttle body is a hell of a lot cheaper but for the dough you could hop on a dyno and see what your a/f situation is like. youll pull 50x more power out of a good tune then you would an aftermarket TB. just my $.02...
When i got my STR 68mm (thanks Boostfed!) it pulled a good deal harder on the top end and it was a noticable differance. Also if you want to keep your daily drivablitly don't put a aftermarket TB on the spring is so much stiffer and it is either open or closed (no it isn't sticking) that is my opinion. U want a bigger TB have yours bored out to 64
