The Bilstein B4 04-10 BMW X3 Front Left Twintube Strut Assembly is a high-performance suspension strut designed specifically for the 04-10 BMW X3. This strut features a twin-tube design, which provides superior damping and handling characteristics, as well as improved ride comfort. It is also equipped with a monotube design for enhanced responsiveness and stability. The strut is constructed from high-quality steel for superior strength and durability. The strut is also coated with a corrosion-resistant coating for added protection against the elements.