Bilstein Motorsport 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 : bil33-616957 Description : Motorsports (Reservoir) - Suspension Strut Assembly Series : Motorsports (Reservoir) Boot Included : No Internal Design : Monotube Lower Mount Type : Special Upper Mount Type : Stem Finish : Zinc Plated Title : Bilstein Shock Absorbers Adjustable Damping : Double Adjustable – Compression and Rebound Body Design : Threaded Body (Coilover) Body Diameter (ID) : 36mm Body Material : Steel Collapsed Length (IN) : 13.8 Collapsed Length (MM) : 350.5 Extended Length (IN) : 18.72 Extended Length (MM) : 475.5 Piston Type : Linear Position : Front Valving Identifier : N/A Adjustable Damping : Double Adjustable Compression and Rebound California Proposition 65 : WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov 2004-2005 Porsche 911 GT3 H6.3606cc Suspension::Shocks and Struts