Del-a-lum performance bushings are available for the stock upper control arm. The bushings press into the stock control arm and can be used with stock or performance shafts. Installation will require welding on the stock upper shaft. The kit comes with four studs, the stud’s tap into the ends of the stock shaft, extending it. Once the studs are tapped into position they must be Tig welded. The shaft length must be lengthened in order to use the correct hardware for adjusting the pre load of the Del-a-lum bushing. The bushing adjusts similar to a wheel bearing. Note: This kit only fits stock control arms.