Fabtech 09-13 Ford F150 4WD 4in Perf Sys w/Dlss ShksFabtech's new 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'' System allows use of 35'' tall tires and features high arched lower control arm crossmembers constructed of 1 4in 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.