if i have a zx3 and i put a svt suspention on it or different springs will that change my class if i already have a catback intake and underdrive pulley. also does anyone have a sheet that has all the rules
There are a list to the rules. What class were you in before? I don't remember where the underdrive pulley puts you (I'm thinking Street Prepared class for some reason). The suspension will definitely change you if you were running stock, but it wouldn't affect an STS class nor should it an SP class.