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UMI Roto-Joint adjustable rear upper control arms for 1978–1996 GM B-Body are made for street and pro-touring use, combining CNC-cut upper mounting pads, chromoly on-car adjusters and UMI-designed Roto-Joints for smooth, bind-free articulation. On-car adjustability lets you set pinion angle without removing the arms, improving launches and traction while reducing wheel hop. Bolt-in installation typically requires 1–2 hours with basic tools.
UMI Performance 78-96 GM B-Body Adjustable Upper Control Arms- Roto-Joint
