Fabtech's 4" Radius Arm system with the Dirt Logic 4.0 Coilover conversion has been built for the Ford Super Duty to handle the on and offroad demands of the truck enthusiast. This Radius Arm system is a heavy duty upgrade to the factory suspension and will provide additional strength to the vehicle. The heart of this quality system is Fabtech's legendary tubular Radius Arms. The design of these arms comes from Fabtech's racing experience and are built with a tubular structure reinforced by dimple die side plates and heavy gusseting for rugged offroad use. They are superior in strength to the stock stamped arms. A heavy duty Track Bar relocation bracket centers the Super Duty axle under the vehicle and allows for full lock steering of 12.50 wide tires on 5" BS wheels. The front suspension receives the finest shock upgrade on the market with the Dirt Logic 4.0 Coilover conversion. It will provide outstanding damping capacity offroad with a quality on road ride. This Coilover bolts in place of the factory coil spring without removal of the coil spring bucket. The Dirt Logic is constructed with a stainless steel body for maximum corrosion resistance. It comes with a giant 4" diameter aluminum remote reservoir that mounts horizontally above the Coilover to allow for full compression travel with oversized tires. The rear suspension receives a 5" lift block, extended bump stop brackets and Dirt Logic 2.25 shocks for a balanced ride quality. This 4" Radius Arm system with the Dirt Logic 4.0 Coilovers is the ultimate suspension system for Super Duty owners that want to turn heads and tackle the toughest offroad terrain. System includes a free 5 year 60,000 mile powertrain warranty. Each Fabtech component has been designed with specific features and benefits that create this quality suspension system. For a greater understanding of each these components, please see below.

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