The Bilstein B4 Series 19-199511 is a high-quality gas pressure shock absorber designed as a direct replacement for the BMW E46 M3. Engineered to restore the vehicle's original ride characteristics, handling, and safety. This Twintube shock absorber ensures consistent performance by utilizing Bilstein's gas pressure technology. Features: Rear Axle Position, Bottom Eye/Top Pin mounting. This item is sold as a single unit. Included in the set: 1x Shock Absorber (Part Number: 19-199511).