Mazda MX-5 Miata (NB, 1998–2005). The NB Miata, one of the best track-day values ever. Explore JRZ’s handbuilt coilovers for the NB, custom-valved and adjustable up to 3-way double-adjustable for street, track day, and competition use. As the official U.S. JRZ distributor, we help you spec the right kit and valving, with expert setup support and fast shipping.