Suspension Spring Kit, 2 in Lowering, 2 Coil Springs, Black Powder Coat, Rear Only, GM A-Body 1964-72 / GM G-Body 1977-88, Pair
UMI Performance was founded in 2002 as a father/son business developing performance parts for GM and Ford products. They quickly began to focus on suspension upgrades for both older and late model muscle cars, and have become a leader in replacement and high-performance suspension components, from individual parts to entire kits.