The Bilstein B4 01-06 BMW M3 Front Right Twintube Shock Absorber is a high-performance shock absorber designed to provide superior handling, stability, and control for BMW vehicles. It features a twin-tube design with a gas-pressure shock absorber, which is designed to provide improved ride comfort and handling. The shock absorber also features a self-adjusting deflective disc valve, which helps to reduce body roll and improve cornering stability. Additionally, it is constructed from corrosion-resistant material for long-lasting durability.