Bilstein B6 Performance (DampTronic) dampers are a performance upgrade to OE dampers designed to be paired with OE factory springs. All of the active features of the factory electronic suspension, along with the factory controls, will be retained with the installation of these dampers. Each damper is rigorously tested for quality that meets or exceeds OE standards and features application specific valve settings with a monotube design to bring out the best handling performance of a vehicle. B6 Performance (DampTronic) dampers will deliver improved safety and handling performance in a package compatible with factory electronic damping control. Mercedes-Benz SL63 AMG 2015-2013; SL65 AMG 2015-2013; SL550 2015-2013 Mercedes-Benz SL63 AMG 2015, SL65 AMG 2015, SL550 2015-2013