Designed for the 2017 Ford F450/F550 4WD, Fabtech’s 6-inch 4 Link Conversion suspension system is engineered to handle extreme on-road and off-road demands. The F450 and F550 feature a significantly more robust suspension platform than the F250 and F350, requiring specialized heavy-duty components developed exclusively by Fabtech.
This system includes everything needed to convert the factory front suspension to a true 4 Link configuration. The 4 Link design reduces caster change throughout the suspension travel, improving on-road stability and steering feel, while providing increased articulation off-road compared to a radius arm system.
Fabtech’s 4 Link system has been proven through more than 10 years of use in consumer, commercial, and military applications. Precision-engineered suspension geometry and high-quality components make this system one of the most advanced Super Duty suspension solutions available.
Each Fabtech component is built in-house and designed with specific features and benefits to deliver long-term durability, excellent ride quality, and superior performance in demanding conditions.








