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. BMW 323i 2011-2006; 325i 2006; 325xi 2006; 328i 2013-2007; 328xi 2008-2007; 330i 2006; 330xi 2006; 335d 2011-2009; 335i 2013-2007; 335is 2013-2011; 335i xDrive 2013-2009; 335xi 2008-2007 BMW 325i 2006; 325xi 2006; 328i 2013-2007; 328i xDrive 2012-2009; 328xi 2008-2007; 330i 2006; 335d 2011-2009; 335i 2013-2007; 335is 2013-2011; 335i xDrive 2012-2009; 335xi 2008-2007