Top center body must be straight from sideboard to sideboard. NO flap or rudders may be attached to the side or center section. Nerf bars may not be covered so as to give the effect of a wing. Mud deflectors may be used but must be securely mounted flush with outside of main rail. All wings must be constructed in such a manner that NO hydraulic or mechanical adjustments can be made by a driver from the inside of competition car.
Front wing is optional.
Fuel is restricted to alcohol with only approved additives. All fuels are subject to testing at any time by the Tulsa Speedway staff and any deviation or violation of these specifications will result in immediate disqualification. A fuel shut-off valve shall be required within reach of the driver. NO vinyl or plastic fuel lines may be used. Fuel cells are mandatory.