One other major variation is that the Stage one package comes with a single 92mm GT500 throttle entire body, when the Stage two kit includes the billet 112mm round throttle system (which works by using GT500 electronics) that we discussed earlier. Whipple offers entire kits which come with almost everything https://lebanon-ford-whipple-must81357.fireblogz.com/55944996/facts-about-whipple-supercharger-mustang-gt-revealed