BILSTEIN has a legendary reputation for providing original equipment components to many of the world’s finest vehicle manufacturers. The BILSTEIN B4 Series provides the same OEM quality and ride stability for the aftermarket. BILSTEIN uses both monotube and twin-tube technology to give the best in OE replacement driving comfort at a great economical price. *Product Benefits:* * Constant damping characteristics under any load * Consistent performance and handling give the vehicle a new car feel every time * Proven BILSTEIN gas pressure technology * High OEM quality standards *BILSTEIN B4 Air Suspension Modules* BILSTEIN engineers worked closely with Mercedes-Benz to develop a top-of-the-class suspension for their top-of-the-line models and the results are the air suspension system. The Mercedes-Benz S-Class (W220/C215) has this system to thank for its famed driving comfort and is also one of the world’s first series production vehicles to be equipped with active springs and dampers. *Product Benefits:* * High OEM quality standards * Proven BILSTEIN gas pressure technology * Responds to street and vehicle conditions in milliseconds for instant adaptivity * Provides excellent comfort and perfect driving characteristics PartNumber : bil22-145550 Description : B4 OE Replacement - Suspension Strut Assembly Series : B4 OE Replacement Boot Included : No Internal Design : Twintube Lower Mount Type : Special Upper Mount Type : Stem Finish : Black Paint Title : Bilstein Shock Absorbers Outer Housing Diameter : 55mm California Proposition 65 : WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov Position : Front 2000-2006 Audi TT Base L4.1781cc Suspension::Shocks and Struts 2002 Audi TT Quattro ALMS Edition L4.1781cc Suspension::Shocks and Struts 2000-2006 Audi TT Quattro Base L4.1781cc Suspension::Shocks and Struts 2004-2006 Audi TT Quattro Base V6.3189cc Suspension::Shocks and Struts 2006 Audi TT Quattro Special Edition V6.3189cc Suspension::Shocks and Struts