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The UMI Performance race weight jack kit for 1982–1992 GM F‑Body gives classic muscle cars a firm, track‑ready ride with 1050 lb/in front and 200 lb/in rear springs. Built from US steel with thrust bearings for easier ride height adjustment, it allows 0–2½" lowering and was largely tested at a 2" drop. Intended for road race and auto‑x applications, it pairs with UMI, Viking or Koni dampers and fits factory and UMI k‑members with some clearance notes for rear housings.
UMI Performance 82-92 GM F-Body Front and Rear Weight Jack Kit Race
