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UMI boxed rear lower control arms for 1978–1988 G‑Body combine a Delrin‑lined Roto‑Joint on one end with greaseable polyurethane bushings on the chassis side. Fabricated from 0.120" rectangular tubing with CNC machined bushing holders and MIG‑welded end caps, they eliminate flex and reduce wheel hop while offering reinforced sway bar mounts, durable powder coat finish and full assembly for a street‑ready, high‑travel suspension upgrade.
UMI Performance 78-88 G-Body Boxed Lower Control Arms- Poly/Roto-Joint
