Bilstein B8 Performance Plus dampers are a performance upgrade to OE dampers designed to be paired with aftermarket lowering springs. These dampers offer application specific valve settings with a monotube design to bring out the best handling performance of a vehicle. Each damper is rigorously tested for quality that meets or exceeds OE standards. B8 Performance Plus dampers are the ideal solution for pairing with a lowering spring for improved handling and sportier look with the added benefit of world-famous Bilstein quality. 46mm Monotube Shock Absorber BMW 528i 2014-2011; 535i 2014-2011; 550i 2014-2011; 640i Gran Coupe 2015-2013; 650i Gran Coupe 2015-2013 BMW 528i 2016-2011, 530i 2017, 535d 2016-2014, 535i 2016-2011, 550i 2016-2011, 640i Gran Coupe 2017-2013, 650i Gran Coupe 2017-2013, ActiveHybrid 5 2016-2012