UMI rear coilover kit – 225lb AutoX spring 1991-pontiac-firebird-esi6483971 12 quarts - 763 ppm

12 quarts - 763 ppm - 920 ppm

and UMI’s proven sway bars for balanced handling

4 grams Zinc (Zn)

We do not recommend adjusting height on the car without a thrust bearing kit

UMI’s 3056-3 arms are the ultimate in performance and are race proven on the UMI Green Machine

UMI rear coilover kit – 225lb AutoX spring 1991-pontiac-firebird-esi6483971 12 quarts - 763 ppmUMIs bolt in rear coilover bracket kit is a complete mounting solution for your Quick Performance axle in your 1978 1988 GM G Body. This bracket features a multi position design to allow further fine tuning of ride height and shock location. In addition to shock location adjustability, the UMI 3054 features five positions of trailing arm location adjustment to match the Quick Performance adjustable lower control arm brackets. Minor drilling is