Fabtech's 4'' F150 system utilizes their proven heavy duty construction and design features found in their 6'' systems but with less lift and at a much lower price. This 4'' Systems allows use of 35'' tall tires and features high arched lower control arm crossmembers constructed of 1/4'' thick steel for maximum strength. The Fabtech ductile iron steering knuckles retain the stock track width keeping tires under the fender for a clean appearance. Rear lift is accomplished with a block and u-bolt. The Performance System features Dirt Logic 2.5 Stainless Steel Coilover front shocks and Dirt Logic Stainless Steel 2.25 rear shocks for aggressive offroad capabilities with a smooth highway ride. The 4'' System allows use of 33'' or 35'' tires and is ESC (Electronic Stability Control) and Traction Control compliant. Estimated installation time - 3-4 hrs. 1 hole to drill for installation. No Welding Required. No Driveshaft Modification required.