Spec MX-5 Challenge 2019 Rule Book
For 2019, drivers may elect to rent series-owned cars, buy cars from the series, have cars built by series-approved builders or build/modify their own cars. For the specification of new builds by the series-approved builders, click here. For series cars for sale, check here.
Spec MX-5 Challenge Sporting Regulations (click link to view rules)
SCCA Spec MX-5 Rule Adjustments (click link to view rules)