Whats the difference btw a Modular Pulley System and the kind that yoiu just unscrew the pulley and put a different pulley on??, like i hear gm just swaps pulleys and injectors and belt and what not and some vendors say Modular Pulley System and i saw a how to that says you have to take the whole supercharger off to change a pulley, im very confused

you would have to have a modular pulley system to be able to unscrew your pulley, the stock one is pressed on...

you take the SC off cuz the stock pulley is pressed on, the modular pulley system is a hub that is pressed on where the stock pulley goes which fits inside the pulley and you put it on with the bolts provided. the GM stage 2 is modular also...

oo okay good thanks, cuz i thought there was 2 kinds, one you take off the sc and one u take off pulley