UMI Performance 78-88 GM G-Body Rear Coilover Bracket Kit Bolt-In Brackets OnlyUMIs bolt in rear coilover bracket kit is a complete mounting solution for your factory axle 1978 1988 GM G Body. This race proven lower bracket bolts in using the standard trailing arm mounting hole as well as an additional reinforcement hole normally used by the standard rear shock. This bracket features a multi position design to allow further fine tuning of ride height and shock location (). The kit also features upper reinforcement tabs to