MINI Cooper and Cooper S Hatch (F56, 2014 to present). The go-kart MINI, made even sharper with JRZ. JRZ’s handbuilt dampers for the F56 come in multiple levels of adjustment, up to 3-way double-adjustable, and are custom-valved to your car and your goals. We are the official U.S. JRZ distributor, so you get expert spec, valving, and setup support with quick shipping.