Fabtech 17-21 Ford F250/F350 4WD Diesel 8in 4Link Sys w/4.0 & 2.25

This Fabtech 8-inch 4-Link Conversion System is designed for your 2017-2020 Ford F-250 or F-350 Super Duty with 4WD and a diesel engine. What you get in this kit are heavy-duty 4-link components that replace the factory radius arms, a massive Dirt Logic 4.0 remote reservoir coilover conversion kit, and rear Dirt Logic 2.25 shocks. This system is built to handle both demanding off-road terrain and provide a comfortable ride for daily driving.

The 4-link setup offers significant advantages over the stock radius arms. It provides less caster change as the suspension moves through its travel, which translates to more stable handling on the road. For off-road adventures, this design allows for greater articulation, letting your tires maintain contact with the ground over rough surfaces. A key feature is the extended-length, offset track bar, which is unique to this system. It's designed to work with the sensitive steering box in newer Super Duty trucks, keeping the track bar and drag link closer to parallel to reduce steering wander. This track bar is 4 inches longer than stock and comes with a robust 1/4-inch thick steel mounting bracket, allowing for full lock steering with up to 15.50-inch wide tires.

The included Dirt Logic 4.0 remote reservoir coilovers are substantial, featuring a 4-inch diameter body and a horizontal reservoir mount. This design ensures they can handle the full range of suspension travel, even with oversized tires, while offering excellent damping for both off-road capability and a quality on-road feel. The coilovers bolt directly into place of the factory coil springs without needing to remove the coil spring buckets. Fabtech's 4-link systems have a proven track record, with over a decade of use in commercial and military applications, demonstrating their durability for daily driven vehicles. This system also comes with a 5-year, 60,000-mile powertrain warranty from the manufacturer.