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. Twintube Strut Assembly Coming Soon BMW 228i 2016-2014; 230i 2019-2017; 328d 2018-2014; 328i 2016-2012; 330i 2018-2017; 335i 2015-2012; 340i 2018-2016; 428i 2016-2014; 428i Gran Coupe 2016-2015; 430i 2019-2017; 430i Gran Coupe 2019-2017; 435i 2016-2014; 435i Gran Coupe 2016-2015; 440i 2019-2017; 440i Gran Coupe 2019-2017; ActiveHybrid 3 2015; M235i 2016-2014; M240i 2018-2017