The Bilstein B4 range are high quality gas shock absorbers that are engineered as direct replacements for the worn factory shocks on your E39 Estate. Made in Germany by the very best in the industry, these shocks will vastly improve the way your BMW rides and handles due to their design and use of high quality componentry. The perfect solution for most people, they will restore the finesse and suspension damping back to the way your car felt when it first rolled out of the factory. The B4s are direct-replacement shock absorbers with increased longevity, and have been designed specifically for E39 touring models optioned with self-levelling suspension. Not suitable for vehicles fitted with M Sport suspension.