These lower control arms are built specifically for tall spindle conversions. The arms are fully assembled with the correct tapered ball joints, polyurethane bushings, poly bump stops and spring cushions. The arms will not only enhance the performance of your front suspension, by reducing lateral flex, but also reduce bind throughout the suspension travel. The arms offer a zero bind end-link for the sway bar and a polyurethane spring cup which rotates 360 degrees to ensure proper spring indexing.