The Bilstein B4 2000 BMW X5 4.4i Front Left Twintube Strut Assembly is a high-performance replacement strut designed to provide superior handling, stability, and comfort. This strut is constructed from a durable steel body, featuring a twin-tube design with a gas-pressure monotube shock absorber. It is designed to provide improved steering response, improved ride comfort, and increased control. This strut is compatible with the BMW X5 4.4i model, and comes with a limited lifetime warranty.