Fabtech takes their 4” Ford F250/F350 4WD systems to the next level with the release of the Dirt Logic 4. 0 Coil over Conversion. This bolt on Coil over conversion will transform the ride quality of the Super Duty while providing outstanding damping capacity for rugged off-road use. The Dirt Logic 4. 0 Coil over is constructed with a stainless steel body and a Nitro Steel piston rod for maximum corrosion resistance. This 4” lift Coil over Conversion is offered with Fabtech' s Tubular Radius Arm or 4 Link Systems.