6-Inch Vertex Coilover Lift Kit for Ford Super Duty 4WD (2017–2022) with Vertex Rear Coilovers

6-Inch Vertex Coilover Lift Kit, fitment-checked

Rough Country 51259 is a 6-inch lift kit for 2017–2022 Ford F-250 and F-350 Super Duty 4WD models, built around adjustable Vertex 2.5 front coilovers and Vertex 2.5 rear shocks. Diesel-only fitment: it does not fit gas engine models, manual shift transfer cases, dually models, or trucks with the Tremor Factory Trim Package.

This 6-inch lift kit for the 2017–2022 Ford F-250/F-350 Super Duty 4WD replaces the front suspension with left- and right-hand adjustable Vertex 2.5 coilovers rated across a 4.5-inch to 6-inch range, and pairs them with two Vertex 2.5 rear shocks. The package also carries a radius arm kit and two radius arm upgrade boxes, a transfer case clocking kit, and a 6.5-inch block and U-bolt set with overloads. Rear blocks are fabricated rather than cast and are shaped to resist axle wrap. Trucks with the 10-speed transmission need the dial pin removed. A downloadable installation guide is available.