All classes must use a 7 Cell NIMH or 2 cell LIPO battery. The maximum lipo battery voltage in all classes is 8.440 volts. All classes have a open tire except if specified. No gyro's. stability control, traction control or any driving aids allowed in any class. Race marshal has the right to check and inspect any car at any given time. If you our racing, you are expected to help out marshaling after your race event to speed up the races.