Rule Updates for 2025 World of Outlaws Sprint Car Season
CONCORD, N.C. — The World of Outlaws NOS Energy Drink Sprint Car Series has made six rule updates for the 2025 season.
The changes include:
Chapter 3, Section 1, F, d.
d. Once the draw has commenced, a team may not enter a backup car in order to manipulate the car count to gain an advantage in the qualifying order.
Chapter 3, Section 1, Q.
Q. Steel and stainless-steel headers will be allowed. Titanium headers will not be permitted. Elbows on the exhaust after the header tube enters the collector, will not be allowed. All exhaust must exit toward the rear of the car. Heat deflecting measures may be used to protect parts at the rear of the car, at the discretion of World of Outlaws Sprint Car Series officials.
Chapter 3, Section 2, C.
C. A fuel cell with bladder and foam will be the only type of fuel cells allowed. The fuel cell shell must be of one-piece construction of cross-link polyethylene plastic. Alterations and modifications will not be permitted. It is highly recommended 6 mounting points be used for the fuel cell. All fuel cell mounting bolts must be safety wired.
Chapter 3, Section 5, G.
G. Axles
a. Only front axles made of magnetic steel will be permitted. Approved front axle dimensions are:
i) 2 1/4” diameter x .120” material thickness
ii) 2 3/8” diameter x .095” material thickness
iii) 2 1/2” diameter x .095” material thickness
b. Ultra-light rear axles are not recommended for 2025 and will not be allowed in 2026. After Jan. 1, 2026, the maximum inside diameter of the rear axle will be 1.8750.”
Chapter 3, Section 8, A, c.
a. A removable wicker bill, maximum height of 1.500 inch, may be mounted on the rear edge of the top wing center foil. Wicker bill must be 90 degrees to the top of the center foil. Built-in wicker bills or gurney lips will not be permitted. The maximum dimension of the wicker bill may change periodically at the discretion of World of Outlaws Officials. Any such changes will be issued in writing prior to the event in which the change will be made.
The increased maximum height of the wicker bill comes after continued discussions with our partners following the National Sprint Car Council meeting at PRI and determining it’s in the best interest of the Sprint Car industry. This will put most of the 410 Winged Sprint Car series across the country on the same wicker bill.
Chapter 3, Section 11, D. d.
c. Seats must be used as supplied and installed following instructions provided by the seat manufacturer. When spacers are used, they must conform to the seat and to the seat mounting tubing of the chassis. It is highly recommended the back mounting spacers are 2” or less in length.
Additionally, fire suppression systems, which are mandatory to compete with the World of Outlaws, that are two years old must be recertified to meet the SFI specification. Contact the manufacturers such as Lifeline and SPA for recertification.
For the complete World of Outlaws NOS Energy Drink Sprint Car rule book, CLICK HERE.
The 2025 World of Outlaws NOS Energy Drink Sprint Car season will begin at Volusia Speedway Park’s Federated Auto Parts DIRTcar Nationals, Feb. 5-8.
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