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UMI bolt‑in rear lift bar set for 1964–1972 GM A‑body vehicles replaces factory rear control arms to add traction while keeping ride height, loading the chassis under acceleration for better launches and less wheel hop. Constructed from boxed mild steel with greaseable polyurethane bushings and reinforced sway bar sleeves. The bolt‑in P/N 4022 fits without drilling or welding for street use, includes hardware and instructions, and offers three rear bracket positions to correct geometry on lowered cars.
UMI Performance 64-72 GM A-Body Rear Lift Bars-Bolt-In
