MMX Performance Height Adjustable Sport Spring Kit - G87 M2 | G80 M3 | G82 M4Unlike conventional lowering springs, the MMR Height Adjustable Sport Spring kit for the current G87 M2, G80 M3, and G82 M4 gives you a fully customizable ride height adjustment. So however you want your car to sit, this Height Adjustable Spring (HAS) kit allows you to infinitely fine tune heights front and rear until you reach your ideal stance. By retaining the Adaptive M dampers, this solution costs much less than upgrading to coilover suspension