UMI rear lower control arms, tubular, adjustable, heavy-duty.Upgrade your rear lower control arms with UMI's heavy duty tubular set up. Constructed of DOM mild steel tubing, CNC machined, and fully TIG welded for maximum durability. These control arms come with polyurethane bushings for a smooth ride and feature on car adjustability for quick adjustments with just a turn of a wrench. These control arms are designed to provide additional clearance for large tires and center aftermarket rear ends in the wheel