Racing Beat has designed suspension coil springs for the MX-5 that are suitable for street or track use. This complete set of front and rear suspension springs were designed specifically for the MX-5 by Racing Beat’s engineering staff. Ideally suited for use with the stock Mazda shocks the Racing Beat springs will interchange exactly with the stock springs.
These springs have been designed with a rate increase of approximately 25% (front - 145 lb/in) and 25% (rear - 112 lb/in) with a modest drop of .5-inch (front & rear). (As compared to a MX-5 equipped with a manual transmission.)
For information on the correct method to shorten the "bump rubbers" when installing these springs, click here.(PDF)