The Bilstein B6 2003 BMW Z4 2.5i Front Left 36mm Monotube Strut Assembly is a high-performance suspension component designed to improve the handling and stability of your BMW Z4. This strut assembly is crafted from a single piece of 36mm steel tubing, providing superior strength and durability. It is engineered to provide a smooth and comfortable ride while also reducing body roll, increasing cornering grip, and improving overall vehicle control. This strut assembly is an ideal upgrade for those looking to enhance their BMW Z4's performance.