I have these sets of callipers, pistons are 38mm, MR2/Levin brake pads fit. But MR2 pistons are 36mm and everything else I have looked at are either bigger or smaller than mine: I have already asked Russ on here, he reckons mk2 n/a mr2, but only info on them is 41mm singles? Only Toyota 38mm pistons I can find are for ST205 rear single pots, completely different design.. Asking here for anyone else with ideas, because these are pissing me off!