Koni 17-25 Ford F550/F600 FSD RV Rear Shock

Improve the ride comfort and stability of your Super C motorhome with the KONI 8805-1112 Frequency Selective Damping (FSD) Rear Shock, designed for 2017-Current Ford F550 and F600 4WD chassis. These premium shocks are engineered to deliver improved ride control, reduced vibration, and better highway stability—especially important for Super C motorhomes, expedition trucks, and heavily loaded commercial vehicles. KONI FSD technology automatically adapts damping based on road conditions. The shock remains firm during heavy suspension inputs such as cornering, braking, and large bumps while softening over expansion joints and rough pavement to provide a smoother ride. A specialized internal valve system helps filter harsh road vibrations before they reach the chassis, improving passenger comfort and reducing driver fatigue on long highway drives. The result is better rear suspension control, improved stability, and enhanced overall ride quality. If your Ford F550 or F600 Super Duty motorhome experiences rear suspension bounce, harsh ride quality, or instability under heavy loads, upgrading to KONI FSD shocks is one of the most effective ways to improve ride comfort, suspension performance, and driving confidence.