Ford Racing M5300B Front/Rear Spring Kit For 79-00 Mustang Designed for 1979 - 2004 Mustang Will lower V-8 front, .875" and 1994 - 2004, up to 1 1/8" Will lower V-8 rear, .5" and 1994 - 2004 models up to 3/4" Spring rates for front, 425/530 and rear, 200/300 Due to vehicle assembly these specs could vary