KW Height Adjustable Spring Kit for BMW’sH. A. S Height Adjustable Spring Kit KW H. A. S Height Adjustable Spring kits are a great alternative to conventional springs. You can adjust the height of your vehicle with the KW height adjuster. These kits are ideal for cars with either stock type shocks or the factory EDC Electronic Damping Control shocks, as the factory EDC system is retained. This lowering solution from KW optimizes the dynamic performance and steering behavior while still using