These arms utilize the SuperPro bushings and are manufactured from a high strength material and come complete with a heavy duty ball joint. By eliminating the O.E style rubber bushing, these arms have been optimised for longevity, durability and performance, without any unwanted NVH. SuperPro Control Arms are perfectly suited as a standard replacement and are an upgrade from the factory arms, eliminating the undesirable arm movement to maintain better steering geometry in all driving conditions. SuperPro Tip - SuperPro strongly advises that both arms should always be replaced at the same time to maintain the correct geometry and operation of the vehicle.