UMI Performance 78-88 GM G-Body Adjustable Lower Control Arms Offset BushingsUMI P N 2017OF features off set aluminum bushings and smaller diameter tubing that place the control arm inward for additional clearance when running large tires. This type of set up is also needed when running a mini tub to achieve the most clearance as possible. The supplied aluminum step bushings place the control arm inward 3 8 of an inch further then our standard control arm version. These double adjustable control arms are designed for race