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UMI rear leaf springs and poly shackle kit for 1970–1981 GM F‑Body lowers the rear 2" to 2½" and replaces factory bushings with high‑performance polyurethane shackles. These US‑made multi‑leaf springs bolt into the stock location with preinstalled front rubber bushings, use self‑lubricating isolators, heavy duty clips and offer improved handling, reduced wind‑up and a durable gloss black powder coat finish.
UMI Performance 70-81 GM F-Body Rear 2in Leaf Springs Shackle Kit - Poly
