The radiator must be correct for the year, make, model, and horsepower claimed. No lightweight, aluminum radiators allowed. Overflow catch cans of at least 16 ounces are required. Radiator shrouds must be correct for the application. The fan must be factory original and correct for the year, model, and horsepower claimed. Aftermarket "lightweight" flex-fans are NOT allowed.
Radiators should only contain water for this event. Anti-Freeze is very slippery and difficult to clean up if it ends up on the racing surface.