2017-2019 FORD F250/F350 Super Duty4WD 3.5" LIFT KIT - for use on trucks with 1pc driveshaft. RTX offers F250/F350 Super Duty 4WDowners the opportunity to lift their trucks a nice 3.5 inches in front which can allow for a 35 inch tire with norubbing. 37" may require some minor trimming depending on wheel offset. The RTX35355 3.5 inch lift kit includes heavy duty steel front coil spring spacers to gain 3.5 inches of front lift and heavy 4 inch tall taperedcast iron rear lift blocks with factory-style bump stop landings. This kit includes new radius arm drop brackets to correct caster, along with sway bar drop brackets, shock extensions and bump stop extensions to keep the front suspension performing like stock. Not for use on F350 DRW. Kit does not include new shocks. New shock are not required with this kit.