The Bilstein B8 Performance Plus series is a high-pressure gas pressure shock absorber specifically designed to be paired with aftermarket lowering springs. These dampers offer progressive handling and enhanced sport performance while maintaining ride comfort. This product is a single rear 46mm Monotube Shock Absorber. Key features include: Monotube gas pressure technology, consistent performance under any load, and optimum adhesion and enhanced lane change stability. Part Number: 24-239431. Package includes: 1x Rear Shock Absorber (24-239431).