Our 59-64 Cadillac Extreme rear suspension system is a 100% bolt-on OEM style kit designed to lay a 29" tall tire. The revised wishbone features a high angle spherical joint with a 17-4 stainless steel taper pin that provides increased strength and bind-free movement through the entire suspension range. Whether you are looking for the ultimate slammed stance or merely upgrading worn out stock components, our kit has you covered. The kit includes the upper wishbone, lower link bars, bag cups, KYB shocks and all required hardware.