Another main variance would be that the Stage one kit includes one 92mm GT500 throttle system, even though the Stage two kit comes with the billet 112mm spherical throttle body (which uses GT500 electronics) that we talked about before. Large oversized aluminum intercooler reservoir (over 2 gallons) holds over double https://ford-mustang-whipple-supe25802.shoutmyblog.com/24707128/2015-ford-mustang-gt-whipple-supercharger-options