Designed for 2017-2022 Ford F250 and F350 4WD models, Fabtech’s 4 Link Conversion System is engineered to deliver maximum suspension performance for both on-road comfort and extreme off-road capability. This system replaces the factory radius arm suspension with a heavy-duty 4 link design to dramatically improve strength, articulation, and overall suspension control.
The advanced 4 link geometry provides near-zero caster change throughout the suspension travel range, resulting in improved highway stability and predictable handling. Off-road, the 4 link system delivers significantly more articulation than a traditional radius arm setup, allowing the vehicle to traverse rough terrain with greater control at all speeds.
The front suspension is upgraded with Fabtech’s Dirt Logic 4.0 coilover conversion, the finest shock upgrade available for the Super Duty platform. These massive coilovers deliver outstanding off-road damping while maintaining excellent on-road ride quality. The system bolts directly in place of the factory coil spring without removing the factory upper coil bucket.
The Dirt Logic 4.0 coilovers feature stainless steel shock bodies for maximum corrosion resistance and are paired with a massive 4" diameter aluminum remote reservoir that mounts horizontally above the coilover. This design allows full compression travel with oversized tires while providing superior heat dissipation during aggressive off-road use.
The rear suspension is lifted using 5" cast iron blocks, extended bump stop brackets, and Dirt Logic 2.25 shocks to maintain a balanced and controlled ride quality. Every component in this system has been engineered to work together to create the ultimate Super Duty suspension package.
This 4 Link Conversion System with Dirt Logic 4.0 coilovers represents the pinnacle of Super Duty suspension performance for owners who demand the very best. The system includes a free 5-year / 60,000-mile powertrain warranty.
