The Koni Sport has been around the Miata world for decades, and now it's available for the ND! They are exceptionally long lived with a lifetime warranty for the original purchaser. One of the fastest off-the-shelf shocks you can run in stock class autocross.
Now includes a set of new rear bumpstops - a $45 value.
The Sport has adjustable rebound damping, allowing it to work well with stock springs as well as stiffer units. They are adjusted via the top, no there's no crawling around on the ground.
Due to the large shaft size used by Koni, you will have to drill a larger hole in your bumpstop support washer. New upper washer and crush tubes are included to make installation easier.
Available as a package with Flyin' Miata springs.