Fabtech 09-13 Ford F150 4WD 4in Basic Sys w/Perf ShksFabtechs 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 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