According to the Spec Miata rules in both SCCA and NASA all "Convertible tops and attaching hardware shall be completely removed. Cars may compete with the Mazda factory detachable hard top in place (latches shall be replaced with positive fasteners)". Our hardtop brackets are the "positive fasteners" you are looking for to secure your hardtop safely and legally. They also make great theft deterrents for street driven Miatas, as it is very easy to steal a hardtop with the OEM latches.
Fits all 1990-2005 Miatas with OEM Mazda Hardtop (will not fit Snugtop, and front brackets will work for the CCP fiberglass tops, but the rear brackets will not)