The Bilstein B8 Performance Plus series is a high-performance aftermarket shock absorber designed specifically to be paired with lowering springs. Featuring a 46mm monotube design, it provides consistent, fade-free performance and superior handling for spirited driving. Specifically valved for the BMW X5/X6 chassis, it improves stability without sacrificing daily comfort. This product is a single unit. Included parts: 1x Shock Absorber (Part No: 24-143981), 1x Mounting Nut, 1x Installation Guide. Ideal for vehicles with sport suspension or aftermarket lowering kits. Position: Rear Right.