KW BMW M2/M3/M4 Height Adjustable Coilover Spring Kit (F87/F80/F82)KW Height Adjustable Springs are a great way to give your F8X M2 M3 M4 a lowered look without spending the money for a full coilover kit. Included in this pack you get high quality KW springs and threaded collars that work with your OEM dampers to give you a sporty but comfortable ride that will improve your vehicle's handling and give it a more aggressive stance. For vehicles equipped with electronic dampers from the factory, these Height Adjustable