Three new rules were established for the World of Outlaws NOS Energy Drink Sprint Car Series, starting in 2023.

As of March 10, 2023 forward, the only rear tires permitted will be the following Hoosier Tires:

  1. Right Rear:
    1. D15A
    2. Meduim
  2. Left Rear:
    1. D12A


Seat Belts –
Section 11 – Personal Safety Equipment

  1. Seat Belt and Restraint System
  2. In any type of manufacturer’s installation, the fasteners must be as supplied by the manufacturer. The seat belts must be mounted to the chassis per the manufacturer’s instructions. No belts to seat installation will be allowed.


Fire Suppression
A fire suppression system that meets the SFI 17.3 specification must installed and functional in all race cars at all times when competing with the World of Outlaws Sprint Car Series.

The fire suppression system must include a thermal trigger and a manual trigger, both mounted in the driver’s compartment. The thermal trigger must be in the lower area of the drivers compartment forward of the seat near the area of the fuel pump. The manual trigger must be mounted where it is easily reachable by the driver while seated and belted in the seat. A minimum of one nozzle must be mounted in the lower area of the cockpit forward of the seat.

The DOT approved cylinder manufactured of aluminum or steel must be securely mounted to the frame per the manufacturer’s instructions and the discretion of the World of Outlaws Sprint Car Series Officials. The cylinder must have a minimum capacity of 5 lbs.

The system must be fully charged and display a legible and valid SFI 17.3 and manufactures label, easily viewable at any time by World of Outlaws Sprint Car Series Officials. Cylinders that are beyond useful certification date must be inspected, serviced and re-labeled by the manufacture.

If a nozzle is connected to the cylinder with a line, the line must be metal or metal reinforced and must be triggered at the end of the line.