The AST 2000 Series Coilovers for Audi A4 B5 are a set of adjustable suspension coilovers designed to provide improved handling and performance. The coilovers feature a monotube design with a 46mm piston for a smooth and consistent ride. The kit includes adjustable ride height, adjustable spring preload, adjustable rebound damping, and adjustable camber plates. The kit is designed to provide improved cornering, grip, and stability, while still offering a comfortable ride.