Fabtech's new 4'' F150 system utilizes their proven heavy duty construction and design features found in our 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 the tires under the fender for a clean appearance. Rear lift is accomplished with a block and u bolt configuration. The Performance System features Dirt Logic Stainless Steel 2.5 Coilover front shocks and Dirt Logic Stainless Steel 2.25 rear shocks for aggressive offroad capabilities with a smooth highway ride.