Mazda 3... with a supercharger???

Are different pulleys available to up the PSI?

Of course. The stage 2 doesn't need a smaller pulley, just to remove the restrictor plate, add an intercooler, swap injectors, and a different tune. Stage 2 is MS3 power or better. Stage 3 is a smaller pulley I think.
 
i personally drove a stage 1. this is EXACTLY what a 2.3L mz3 needs. it already handles well, good brakes, clean interior, just a little more power. i cant wait for stage 2 to be a for sure. and then stage 3 = axela on the Nrburgring
 
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