The Bilstein B6 13-15 BMW X5 Rear Left 46mm Monotube Shock Absorber is a high-performance shock absorber designed for the 2013-2015 BMW X5. This shock absorber is constructed with a 46mm monotube design that provides superior damping performance and improved ride comfort. It features a corrosion-resistant zinc plating for long-lasting durability and is designed to reduce body roll and improve handling. This shock absorber is the perfect choice for those looking to upgrade their suspension system and improve their driving experience.