2" Rear Leveling Lift Block Kits Fit 1999-2020 F250 F350 Super Duty 2WD 4WD truck. 1999-2020 F350 Super Duty 2WD 4WD. 1999-2020 F250 Super Duty 2WD 4WD. 2" Rear Leveling Lift Block Kits. Adopt 12.9 grades lengthen the leaf springs U bolts and thicker washers.Strong and durable, corrosion resistant.Give your truck the perfect change in appearance, performance and style.