The Bilstein B6 2012 BMW Z4 sDrive35i Front Left Suspension Strut Assembly is designed to provide superior handling and ride quality for your BMW Z4. It is constructed with a monotube design and is made from high-quality materials for enhanced durability and longevity. The assembly includes a dust boot, jounce bumper, and spring seat, as well as a mounting plate and a bump stop. This strut assembly is designed to provide a smooth ride and improved handling for your BMW Z4.