G-Plus tubular lower control arms are shipped fully assembled. They feature Del-a-lum bushings, ball joints, bump stops and a unique rotating spring cushion. The control arms are designed not to raise or lower the vehicle and can be used with stock or dropped spindles. No modifications are required for installation. Performance sway bar end links are also supplied with this kit that enhance the reaction time of the sway bar. The spring cushions are also a great benefit for indexing in the frame. In many cases the after market springs are not totally designed to begin and end in the pocket exactly like the factory. The cushion in the tubular lower arm can be turned in the pocket so the spring will index in the top as well as the lower arm. This is especially desirable if the coil springs have been trimmed for setting ride height. The bushings can be lubricated via grease fitting while installed on the car.