As an upgrade to our popular 4in System we offer the system with our Uniball Upper Control Arms. The Uniball Upper Control Arms feature .120in wall 4130 Chromoly tubing with a 1.50in OD and 1in FK Stainless PTFE Uniballs for unsurpassed strength. The system also includes front differential drop brackets, a 1/4in thick steel skid diff plate along with 1 1/2in rear lift block and u-bolts. The 4in System utilizes the stock front Coilover shocks with upper spacers along with rear Stealth Shocks. Uniball Upper Control Arms are available separately as an upgrade to stock, previously installed Fabtech'suspensions or other aftermarket suspension systems.