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.\nPorsche 911 1985-1969; 911 1989; 912 1969; 914 1976-1970\nPorsche 911 1985-1969, 911 1989, 912 1969, 914 1976-1970