The Bilstein B8 Performance Plus shock absorber (24-120425) is a high-pressure gas monotube shock designed to be paired with aftermarket lowering springs. Engineered specifically for the BMW 335i xDrive, these shocks offer improved handling and stability by providing a sporty feel while maintaining ride comfort. Features 46mm monotube technology for consistent, fade-free performance. This part is a single shock absorber. Included in the package: 1x Rear Monotube Shock Absorber (Part Number: 24-120425).