The Bilstein B4 OE Replacement 11-15 BMW X3 2.0L/3.0L Rear Twintube Strut Assembly is a high-performance strut assembly designed to restore the handling and control of your vehicle. This strut assembly is crafted from durable materials and features a gas-pressure design to ensure a smooth and comfortable ride. The product also includes an adjustable spring pre-load and a corrosion-resistant finish to provide superior protection against the elements. This strut assembly is an ideal choice for those looking to upgrade their vehicle's suspension system and improve overall performance.