The KONI Special Active is a twin-tube, low-pressure nitrogen gas rear shock absorber for the 2015 and newer Mazda MX-5 Miata (ND chassis). It uses KONI's FSD (Frequency Selective Damping) valving, a mechanical internal valve that automatically firms up damping for low-frequency inputs like cornering, braking and steering while softening for high-frequency bumps and rough pavement — sharper body control and a more comfortable ride without electronic adjustment. A direct-fit replacement for the factory rear damper, KONI recommends running it with the stock springs.
| Type | Twin-tube low-pressure gas shock absorber (KONI Special Active) |
| Position | Rear |
| Construction | Twin-tube, low-pressure nitrogen gas charged |
| Damping | FSD (Frequency Selective Damping) — self-adjusting, no electronics |
| Spring Compatibility | Designed for use with stock springs |
| Quantity | 1 (sold individually) |
