The Bilstein 16-19 Audi TT Quattro B4 OE Replacement (Air) Shock Absorber is designed to replace the original equipment shock absorber on the rear of 16-19 Audi TT Quattro vehicles. It is a direct replacement for the factory shock absorber, and is constructed of high-quality materials to ensure long-lasting performance. The shock absorber features a monotube design, allowing for increased damping response and improved performance. The shock absorber is also air adjustable, allowing for a greater range of adjustability to suit different driving conditions.