SPC Performance 64-72 GM A Body Pro Coil Lowering SpringsSPC Performance Pro Spring Kit offers immediate handling enhancement and gives your muscle car an aggressive stance! Front springs provide a 1. 3" drop and rear springs 1. 0" drop. Highest quality and design assures springs will retain optimum rates for unsurpassed performance. Springs are epoxy coated with diamond black color and have a lifetime warranty. Sold as a complete vehicle package. If you are using these springs with our lower arms, and need