Just removed a set of springs from a 320is. The ride height looked like stock, but when off the car and compared them to stock (non-is) springs they are much shorter (by 2 coils or so both front & rear). They are a gold anodized color. Are these factory bmw sport springs?? If not, does anyone know what brand they are?? The car also had bilestiens front & rear if that makes any difference.