The Koni Special Active Shock FSD 03-10 BMW X3 / X4 (F25) Front Right is a performance shock absorber designed to improve the ride and handling of your BMW X3 or X4 (F25). It features Koni's patented Frequency Selective Damping (FSD) technology, which automatically adjusts the damping force to the frequency of the bumps in the road for maximum comfort and control. The shock is also adjustable, allowing you to customize the ride and handling to your individual needs and driving style. The Koni Special Active Shock FSD 03-10 BMW X3 / X4 (F25) Front Right is a great choice for those looking to upgrade their suspension for improved handling and a smoother ride.