1mz's do not come supercharged, they come out of Camry's, Solara's, ES300's, Sienna's, Avalons, RX300's and even Highlanders. TRD sold superchargers for them, and that's what's used. MR2's came with a 2L 3S-GTE or a 2.2L 5SFE (used once again, in Camry's, etc.). But most 1MZ swappers already...