Bilstein Motorsports shock absorbers offer the technology and performance necessary to keep serious competitors crossing the finish line first! The monotube design allows for a larger working piston with deflective disc valving, eliminating the need for check valves and other componentry that result in consistencies in valving and variations in performance. Available in steel and aluminum bodies, both sealed and racer-rebuildable, for a wide range of applications from pure stock to NASCAR. PartNumber : bil24-617321 Description : Motorsports - Shock Absorber Lower Mount Type : 15mm Heim Title : Bilstein Shock Absorbers Internal Design : Monotube Series : Motorsports Boot Included : No Upper Mount Type : Stem Finish : Zinc Plated Adjustable Damping : Non-Adjustable Body Design : Threaded Body (Coilover) Body Diameter (ID) : 46mm Body Material : Steel Collapsed Length (IN) : 17.19 Collapsed Length (MM) : 436.5 Compression @0.52m/s : 1875 Extended Length (IN) : 21.57 Extended Length (MM) : 548 Piston Type : Linear Position : Rear Rebound @0.52m/s : 2040 Valving Identifier : N/A California Proposition 65 : WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov 1974 Porsche 911 Base H6.2687cc Suspension::Shocks and Struts 1974 Porsche 911 Base H6.2688cc Suspension::Shocks and Struts 1974 Porsche 911 Carrera H6.2687cc Suspension::Shocks and Struts 1974-1975 Porsche 911 Carrera H6.2688cc Suspension::Shocks and Struts 1974 Porsche 911 S H6.2687cc Suspension::Shocks and Struts 1974-1977 Porsche 911 S H6.2688cc Suspension::Shocks and Struts 1978-1979 Porsche 911 SC H6.2999cc Suspension::Shocks and Struts 1976-1977 Porsche 911 Turbo Carrera H6.2999cc Suspension::Shocks and Struts 1978-1979 Porsche 930 Turbo H6.3294cc Suspension::Shocks and Struts