The Koni Special Active Shock FSD 04-10 BMW 5 Series E60 RWD Front is a high-performance shock absorber designed to provide superior handling and ride comfort. It features a Frequency Selective Damping (FSD) technology which allows the shock to adjust itself to the road surface, providing optimal damping performance. It is made from a durable aluminum alloy and is corrosion resistant. The shock also features an adjustable rebound setting, allowing the user to customize the ride according to their preferences. The Koni Special Active Shock FSD 04-10 BMW 5 Series E60 RWD Front is the perfect choice for those looking for improved handling and comfort while driving their BMW 5 Series.