The Uniball Upper Control Arms feature .120 inch wall 4130 Chromoly tubing with a 1.50 inch OD and 1 inch FK Stainless PTFE Uniball for unsurpassed strength. The system also includes front differential drop brackets, a 1/ 4 inch thick steel skid diff plate along with 1 1/2 inch rear lift block and U-bolts. The 4 inch System utilizes the stock front Coil over shocks with upper spacers along with rear Performance Shocks.