Spec Miata upgraded to STL specs. 1.6L engine built by Chris Windsor. Cusco diff. Three sets of wheels/tires. Hoosier H20 and two sets Hoosier R7. Mounted on TR and Team Dynamics 15 x 7" rims. Street legal!.Car has won while in Spec Miata class. Last three years I have used it only for track day events. Very clean, quick, and reliable.