BMW Z4 (Z89, 2009–2016). The second-generation Z4, a rear-drive roadster that sharpens up beautifully. JRZ’s handbuilt dampers for the BMW Z4 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.