Section 5, T.

Only conventional and thru-rod style shock absorbers will be permitted. No additional components will be added to the torsion arm or other suspension components to help control the suspension, such as, but not limited to additional shocks, springs, spring arms, etc. Only 1 shock per wheel will be allowed, maximum of 4 shocks per car. Any new suspension configuration or new style shock configuration must be approved by World of Outlaws Series Officials prior to being placed into competition. Performance, safety, cost, along with other variables, will factor into the approval process. It is recommended that the approval process be completed prior to product production.

Approved thru-rod style shocks:

1. Penske – Part # PS-7700T

Track	Location	Muffler Rule
Volusia Speedway Park	Barberville, FL	Mufflers Not Required
Magnolia Motor Speedway	Columbus, MS	Mufflers Not Required
Revolution Park	Monroe, LA	Mufflers Not Required
Cotton Bowl Speedway	Paige, TX	Mufflers Not Required
Thunderbowl Raceway	Tulare, CA	Required: DBA Rule (Schoenfeld 14272735-78 is legal)
Merced Speedway	Merced, CA	Required: DBA Rule (Schoenfeld 14272735-78 is legal)
Ocean Speedway	Watsonville, CA	Required: DBA (Must use Flowmaster 53545-10)
Bakersfield Speedway	Bakersfield, CA	Required: DBA Rule (Schoenfeld 14272735-78 is legal)
Perris Auto Speedway	Perris, CA	Required: DBA Rule (Schoenfeld 14272735-78 is legal)
Vado Speedway Park	Vado, NM	Required: WoO Muffler Rule
Lawton Speedway	Lawton, OK	Required: WoO Muffler Rule
Devil’s Bowl Speedway	Mesquite, TX	Required: WoO Muffler Rule
US 36 Raceway	Osborn, MO	Mufflers Not Required
Lake Ozark Speedway	Eldon, MO	Mufflers Not Required
Federated Auto Parts Raceway at I-55	Pevely, MO	Mufflers Not Required
Tri-City Speedway	Pontoon Beach, IL	Mufflers Not Required
Tri-State Speedway	Haubstadt, IN	Mufflers Not Required
Bristol Motor Speedway	Bristol, TN	Mufflers Not Required
Eldora Speedway	Rossburg, OH	Mufflers Not Required
Lincoln Speedway	Abbottstown, PA	Mufflers Not Required
Williams Grove Speedway	Mechanicsburg, PA	Mufflers Not Required
Bridgeport Speedway	Swedesboro, NJ	Mufflers Not Required
Attica Raceway Park	Attica, OH	Required: Must use Schoenfeld 14272735-78
Sharon Speedway	Hartford, OH	Mufflers Not Required
Atomic Speedway	Chillicothe, OH	Mufflers Not Required
Lawrenceburg Speedway	Lawrenceburg, IN	Required: WoO Muffler Rule
River Cities Speedway	Grand Forks, ND	Mufflers Not Required
Huset’s Speedway	Brandon, SD	Mufflers Not Required
Knoxville Raceway	Knoxville, IA	Required: Must use Schoenfeld 14272735-78
Beaver Dam Raceway	Beaver Dam, WI	Mufflers Not Required
Huset’s Speedway	Brandon, SD	Mufflers Not Required
Cedar Lake Speedway	New Richmond, WI	Mufflers Not Required
34 Raceway	West Burlington, IA	Mufflers Not Required
Wilmot Raceway	Wilmot, WI	Mufflers Not Required
Attica Raceway Park	Attica, OH	Required: Must use Schoenfeld 14272735-78
Eldora Speedway	Rossburg, OH	Mufflers Not Required
Port Royal Speedway	Port Royal, PA	Required: Must use Schoenfeld 14272735-78
Williams Grove Speedway	Mechanicsburg, PA	Mufflers Not Required
Weedsport Speedway	Weedsport, NY	Mufflers Not Required
Federated Auto Parts Raceway at I-55	Pevely, MO	Mufflers Not Required
Knoxville Raceway	Knoxville, IA	Required: Must use Schoenfeld 14272735-78
Jackson Motorplex	Jackson, MN	Mufflers Not Required
River Cities Speedway	Grand Forks, ND	Mufflers Not Required
Red River Valley Speedway	West Fargo, ND	Mufflers Not Required
Skagit Speedway	Alger, WA	Required: DBA Rule (Schoenfeld 14272735-78 is legal)
Grays Harbor Raceway	Elma, WA	Required: DBA Rule (Schoenfeld 14272735-78 is legal)
Silver Dollar Speedway	Chico, CA	Required: DBA Rule (Schoenfeld 14272735-78 is NOT legal)
Keller Auto Speedway	Hanford, CA	Required: DBA Rule (Schoenfeld 14272735-78 is legal)
Placerville Speedway	Placerville, CA	Required: Must use Flowmaster 53545-10 or Spin Tech 1545
Eldora Speedway	Rossburg, OH	Mufflers Not Required
Sharon Speedway	Hartford, OH	Mufflers Not Required
Williams Grove Speedway	Mechanicsburg, PA	Mufflers Not Required
Port Royal Speedway	Port Royal, PA	Required: Must use Schoenfeld 14272735-78
I-80 Speedway	Greenwood, NE	Mufflers Not Required
Lakeside Speedway	Kansas City, KS	Mufflers Not Required
The Dirt Track at Charlotte	Concord, NC	Mufflers Not Required

Because of the current tire shortage situation there will be a single tire per night rule implemented until further notice.

Single Tire per race rule: Right rear tires marked at the scale during time trials must be used in the competitors heat race and Feature. A different tire may be used for non-qualifiers race, preliminary main events (C & D, etc.), the Dash and the Last Chance Showdown. A marked tire damaged and approved for replacement by a World of Outlaws Sprint Car Series Official can be replaced per the current rule book Section 10, J & K.

Fire suppression systems meeting the SFI 17.3 specification will be required beginning with the first World of Outlaws Sprint Car Series race of the 2023 season. Below will be inserted into the 2023 World of Outlaws Sprint Car Series rule book.

Chapter 3, Section 11, G. Fire Suppression

• A fire suppression system that meets the SFI 17.3 specification must installed and functional in all racecars 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.

Approved Manufactures

• Lifeline Fire & Safety USA, 540-251-2724
• Safety Systems Inc. (Firebottle), Ft Myers, FL, 239-995-6300
• Spa Technique Inc. Indianapolis, IN 317-271-7941
• Safecraft Safety Equipment, Martinez, CA 800-400-2259

By the first WoO racing event of 2023 fire suppression systems will be required on all World of Outlaws Sprint Series competitors. Sprint Car Safety Council members are in the process of working with SFI and manufacturers to develop a set of specifications which is anticipated to be completed by May 2021. It is anticipated the specifications will include a required number of nozzle/s and their location, minimum 5lb system, bottle construction, type of mounting hardware, etc. It is recommended that anyone considering a sprint car fire suppression system should wait until the SFI specifications are released before making a purchase. If you intend to install a system before the SFI specification is completed, be aware you may be required to update it when the SFI specification is mandatory in 2023.