Description Reviews NM MINI Cooper gen 2 RS progressive rate spring kit provides a responsive ride, sharper handling characteristics and lowered ride height. Progressive rate means the more the spring compresses, the stiffer it gets. So the top half of the spring takes care of all your small bumps, while the bottom half of the spring takes care of deep dips and holes in the road. So this translates into a better ride around town as well as better handling when you want to drive your car in a more spirited manner. Using exacting spring rates and precision manufacturing techniques, RS springs provide a more pleasurable motoring experience. They come in a very tough blue powder coated finish that will last a long time. Fits all MINI Cooper R56, R57, R58, R59's! Cooper or Cooper S. Find the R55 Springs here. Approximate Lowering Heights: 30mm (1.2 inches) Front ~ 30mm (1.2 inches) Rear Note: Adjustable Rear Control Arm for the rear is highly recommended at the same time to get the alignment correct. Does require alignment after install.