The Koni Special Active Shock FSD 04-10 BMW 5 Series E60 RWD Rear is a high-performance suspension system designed to provide superior handling and control for BMW 5 Series E60 RWD vehicles. This system utilizes Koni's Frequency Selective Damping technology to adjust the shock absorber damping force on the fly, providing a comfortable ride in normal driving conditions while also allowing for improved handling and performance when the driver wishes to push the limits. The Koni Special Active Shock FSD 04-10 BMW 5 Series E60 RWD Rear also features an adjustable rebound damping system to further tailor the suspension characteristics to the driver's needs.