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Fabtech rear box kit for 2017–2020 Ford F‑250/F‑350 4WD diesel supports a 4‑inch rear lift as part of the Dirt Logic 4.0 system and installs as a bolt‑on component. The broader Dirt Logic program pairs coilover conversions and tubular radius arm or 4‑link systems to improve ride quality on and offroad; Fabtech notes stainless steel and NitroSteel components and offers a 5‑year/60,000‑mile warranty for these systems.
Fabtech 17-20 Ford F250/350 4WD Diesel 4in Rear Box Kit
