The Bilstein B4 01-05 BMW 325xi/330xi Front Left Twintube Strut Assembly is a high-quality, OE-replacement strut assembly designed to provide superior handling, improved control, and enhanced ride comfort. This strut assembly features a monotube design with a gas-pressurized nitrogen chamber and a twin-tube construction for superior damping and improved durability. It is crafted from high-strength steel and is designed to provide an optimized fit for the specific vehicle.