UMI Performance 64-72 GM A-Body Tubular Front Lower A-Arms Polyurethane BushingsTired of looking at hammered, crusty lower a arms with cracked ball joint bosses? UMI has the solution with brand new modern tubular lower a arms. UMI lower A Arms are fabricated from DOM tubing with CNC machined tube ends for a precision fit. They are jig built to maintain accuracy and bolt on correctly every time. All critical areas are TIG welded for superior strength and a clean look. UMI's lower A Arms also feature improved ball joint angle for