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UMI's P/N 403133 tubular a‑arm kit in black updates 1964–1972 GM A‑Body front suspension by swapping worn stamped arms for strong TIG‑welded tubular uppers and lowers. Upper arms use UMI‑made Delrin bushings and billet CrMo cross shafts while lowers include greaseable polyurethane bushings and spring isolators. Jig‑built for accurate fit, the kit ships assembled with alignment specs and detailed installation instructions.
UMI Performance 64-72 GM A-Body Tubular Upper & Lower Front A-Arm Kit - Black
