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 Porsche 356 1955-1948; 356A 1959-1955; 356B 1963-1960; 356C 1965-1964; 356SC 1965-1964 What's Included: Bilstein B6 48-55 Porsche 356 / 55-59 Porsche 356A / 60-63 Porsche 356B Rear Monotube Shock Absorber Vehicle Fitment: 1948-1955 Porsche 356 Base 1952-1954 Porsche 356 Super 1955-1959 Porsche 356A Base 1955-1959 Porsche 356A Super 1960-1963 Porsche 356B Base 1960-1962 Porsche 356B Super 1960-1962 Porsche 356B Super 90 1964-1965 Porsche 356C Base 1964-1965 Porsche 356SC Base