So B6 shock absorbers are gas-filled shock absorbers with a strong sporty character that offer stability and comfort in perfect balance: they are the first choice when it comes to sports suspension. Designed to increase the performance of your vehicle, they are compatible with the original springs. Characteristics: - Sporty shock absorbers. - Designed to be installed together with original springs. - Pressures individually calibrated by Bilstein engineers at the Nürburgring Nordschleife. - BILSTEIN mono-tube pressurized gas technology