Fabtech's 6 inch Radius Arm System for the F350 Super Duty utilizes Fabtech's patented Radius Arms, which feature a full tubular structure strengthened by dimple die side plates, with an adjustable alignment cam at the axle to allow caster adjustment. Front spring lift options includes 6" replacement Coil Springs. Completing this system is a Trac Bar relocation bracket, Pitman Arm, Sway Bar drops and a rear Block & U-bolt kit. Use up to a 325/65R 18 tires w/ 18x9.5 wheels w /4 3/4a� Backspace. Front driveline modification may be required to clear exhaust on gas motor models. This product ships in approximately 1 days