If you haven't found your vehicle in either the Sport or Tuner Category, please fill out this form to have the Car Classing Committee review it for classing.  This is to class Sport and Tuner Category cars only - Max and Unlimited will fit any production-based full size car based on classing formulas. Formula Cars, Sports Racers and Specials are not classed in the Time Trials National rules, but you can find a suggested regional classing for those cars in the Unlimited Category rules section.