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UMI "Ultimate" on‑car adjustable upper control arms for 1978–1987 GM G‑Body vehicles prioritize adjustability and strength for precise tuning. Built with aircraft‑quality 4140 chromoly components, CNC machined parts and QA1 spherical rod ends, these arms use 6061 aluminum step bushings and full TIG welding. On‑car adjustability lets you set pinion and alignment easily while durable finishes and premium materials reduce common failure points.
UMI Performance 78-87 GM G-Body Adjustable Upper Control Arms - Ultimate Arms
