Since the supra TT brake caliper / rotors are direct replacements for the GS300 98+ ...

that emplys that IS300 brake upgrades along with Surpa TT brake upgrades are direct replacements..

thus.. I could get either an IS300 kit or a supra TT kit and it would fit the same????

 

i am pretty sure the answer is NO. is300 brakes have a slightly different brackets setup from what i heard

 

okay, but will the supra example work?

 

yes the supra calipers will fit on the GS like a charm. in fact my ap racing it's actually for supra, but it fits on GS no problem