6-Inch Vertex Lift Kit for Ford Super Duty 4WD (2017-2022), Part 51756

6-Inch Vertex Lift Kit, fitment-checked

Rough Country 51756 is a 6-inch lift kit for the 2017-2022 Ford F-250 and F-350 Super Duty 4WD, built around a left/right pair of Vertex 2.5 adjustable front coilovers and a V2 monotube rear shock pair. It is diesel-only and single-rear-wheel only: gas engines, dually axles, manual-shift transfer cases, and the Tremor trim package are all outside the fitment, and the truck must have the factory contact overload springs at the rear.

This 6-inch lift kit for the 2017-2022 Ford F-250/F-350 Super Duty 4WD covers XL, XLT, Lariat, King Ranch, Platinum, and Limited trims in 4WD form. The kit converts the front to Vertex 2.5 adjustable coilovers set for the 4.5-in to 6-in range, adds radius arm drop brackets so caster can be set correctly, and pairs fabricated anti-axle-wrap rear blocks with a 6.5-in block U-bolt kit and V2 monotube shocks. A transfer case clocking kit is included. Confirm the diesel, non-dually, and overload-spring requirements first, then work from the downloadable installation guide, which covers both the kit and the coilover steps.