UMI Performance 78-88 G-Body S10 Tubular Front Upper & Lower A-Arms DelrinUMI has raised the bar. Our host of ultra premium features come together in one package to provide your ride with unmatched precision, performance, durability and quality. UMIs P N 383233 2 upper and lower a arm kit replaces the worn out, stock stamped a arms with high strength tubular construction and a host of premium features. The lower a arms feature tough tubular construction and greaseable Delrin bushings for precise handling and smooth