The AST 2021+ BMW M3 G80 / M4 G82 Xdrive 5100 Comp Series Coilovers are a high-performance suspension system designed to improve handling and ride quality. The 5100 Comp Series Coilovers feature a monotube design with adjustable damping, rebound, and ride height settings. The coilovers are constructed from lightweight aluminum alloy and feature a corrosion-resistant finish. The kit includes top plates, lower mounts, and all necessary hardware for installation. The 5100 Comp Series Coilovers are designed to provide improved performance and stability, allowing for greater control and precision when driving.