The Koni Special Active Shock FSD BMW X5 E70 / BMW X6 E71 Front is a performance suspension upgrade designed to improve the handling and ride quality of your BMW X5 or X6. This suspension upgrade features Koni's Frequency Selective Damping (FSD) technology, which provides an adjustable damping system that can be tuned to the specific needs of each vehicle. The FSD technology allows for improved handling, better cornering, and better overall ride quality. The Koni Special Active Shock FSD BMW X5 E70 / BMW X6 E71 Front is also designed to reduce body roll and improve stability.