The Bilstein B16 PSS10 kit is the ultimate race inspired suspension system, delivering unsurpassed driving performance in any situation. This kit puts you in complete control, providing the kind of precise suspension tuning formerly available only on race cars. From a weekend of competition to daily driving, this system provides perfect handling performance for every situation. The manually adjustable damping mono-tube gas shock absorbers feature 10-stage precise compression and rebound settings, from comfort to competition. Bilstein utilizes debris resistant round threads on these dampers to ensure spring adjustment remains effortless throughout the life of the kit. The surface is coated with Triple-C-Technology coating to ensure long lasting resistance to corrosion and flashy good looks. BMW Z4 2008-2006