The AST 5100 Series Shock Absorbers Non Coil Over BMW 1 M Coupe - E82 w/ Formed Springs for OE Mounts are designed to provide superior damping performance and an improved ride quality for the BMW 1 M Coupe - E82. These shocks feature a monotube design with a 46mm piston and a 14mm shaft, providing maximum damping capacity and adjustability. The shocks also feature AST's formed springs for OE mounts, which provide improved stability and handling. Additionally, the shocks are corrosion-resistant and feature a low-friction, hard-anodized coating for increased durability and performance.