The Bilstein B8 Performance Plus series is a high-performance monotube gas pressure shock absorber specifically designed to be paired with lowering springs. This shock absorber is engineered to enhance the handling characteristics of your vehicle while maintaining ride comfort. Featuring a shortened stroke, it ensures the necessary spring tension for lowering kits, providing improved stability and a sportier feel. Part Number: 24-102599 (Rear). Type: B8 Performance Plus. Design: Monotube Gas Pressure. Included in the box: 1x Rear Shock Absorber (24-102599).