Numbers here are for SOFT TOP version of MX5, these are not compatible with the RF chassis. With the additional weight of the RF the heights are incorrect.
Rates 300 Front, 200 rear.

Serious performance springs for the serious street enthusiast, ENOUGH RATE for Canyons to Autocross to Track! We took a Top Time of Day with these on Koni Sport shocks at autocross event with 100+ competitors.

Tested on our Mazda ND and Fiat 124 (shown here on our own Fiat 124 and a customer ND, both built on same ND chassis in Japan, same lowering effect). Stock heights were 14.25 to 14.75 (measured center of wheel up to fender lip). Lowered heights with these springs approximately 13.75 on stock shocks, settles as low as 13.25 as shown here on KONI Sport shocks which are lower pressure than stock shocks. Important to understand these are really too much rate for base trim stock shocks, the stock Bilsteins on the CLUB version handle these well, ideally used with the Koni adjustable SPORT shocks or Bilsteins with our short bump stops.

Your results will vary depending on which shock you use and the age of the shocks, as shock pressure declines over time the car will settle lower.

These MX5 springs feature increased spring rates for vastly upgraded handling capabilities. Certified high-tensile SAE spring wire materials. These MX5 springs are cold-wound on modern CNC coiling machines, then stress relieved, pre-set, and shot-peened for maximum durability.

Rates 300 Front, 200 rear.
-All spring kits are powdercoated.
-Drop amount varies depending on shocks used.