The Bilstein B6 36mm Monotube Strut Assembly is a direct replacement for the 2003 BMW Z4 2.5i Front Right suspension system. This strut assembly features Bilstein's superior monotube design, which provides superior handling and stability. It also features a self-adjusting deflective disc valve that allows for a more precise response to changing road conditions. The strut assembly is designed to improve overall ride quality, reduce body roll, and improve steering response. The assembly is corrosion-resistant and comes with a limited lifetime warranty.