The Bilstein B8 2003 BMW Z4 2.5i Front Right 36mm Monotube Strut Assembly is a high-performance suspension upgrade designed to provide improved handling and stability. This assembly features a 36mm monotube strut body with a digressive piston, a zinc-plated steel body, and a high-pressure nitrogen gas charge. It is designed to provide increased damping power and a more consistent ride in any condition. Additionally, this assembly is an ideal choice for those looking to upgrade their suspension for improved performance and handling.