UMI Performance 68-72 GM A-Body Adjustable Upper Control Arms- Poly BushingsUMI Performance adjustable upper control arms are designed to optimize your vehicle's performance by allowing you to adjust the pinion angle. These control arms are made with high quality materials, including CNC machined 0. 250" steel mounting plates, 4140 chrome moly threaded tube adapters, and a strong 4140 chrome moly adjuster. One unique feature of UMI Performance's control arms is the on car adjuster, which makes it easy to make adjustments
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