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The Fabtech 4-inch Radius Arm Lift System with Dirt Logic 4.0 coilovers for 2017–2021 Ford F-250/F-350 4WD upgrades the Super Duty suspension with fully tubular radius arms reinforced by dimple-die side plates and heavy gusseting. It centers the axle with a track-bar relocation bracket and fits Dirt Logic coilovers with stainless bodies and a large 4-inch aluminum remote reservoir; rear updates include a 5-inch lift block, extended bump stops and Dirt Logic 2.25 shocks. The kit includes a 5-year/60,000-mile powertrain warranty.
Fabtech 17-21 Ford F250/F350 4WD 4in Rad Arm Sys w/4.0 & 2.25
