Bilstein B6 Performance dampers are a performance upgrade to OE dampers designed to be paired with the OE factory spring. 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. B6 Performance dampers will provide improved safety and handling performance with the added benefit of world-famous Bilstein quality. 46mm Monotube Shock Absorber Mercedes-Benz SL55 AMG 2008-2003, SL63 AMG 2009, SL63 AMG 2012-2011, SL65 AMG 2009-2005, SL65 AMG 2011, SL500 2006-2003, SL550 2009-2007, SL550 2012-2011, SL600 2009-2004