The Bilstein B14 Performance Suspension Kit is a race-inspired coilover system designed for the MINI Cooper (R50/R52/R53). It features threaded body height adjustability, allowing for a lowering range of 30mm to 50mm both front and rear. The kit utilizes Bilstein's gas-pressure technology and Monotube/Upside-Down technology for superior handling and stability without sacrificing street comfort. Triple-C-Technology surface coating provides long-lasting corrosion resistance. Kit Components: - 2 x Front Performance Gas Struts (Bilstein Monotube) - 2 x Rear Performance Gas Struts (Bilstein Monotube) - 4 x Progressive Rate Lowering Springs - 1 x Adjustment Spanner Wrench Set - Component Parts: Aluminum Spring Seats, Lock Rings, and Bump Stops.