Height adjustable springs give you a mix of features shared between coilovers and lowering springs, without the commitment that either one requires. If you are considering installing coilovers on a newer model BMW, you've probably thought about your EDC system. Height adjustable spring systems allow you to retain EDC, like you would be able to with lowering springs, but also give you height adjustability you would get from coilovers. Height adjustable springs are the perfect option for newer BMWs looking to retain factory EDC functionality and fine tune ride height.