358 Rules

5. Maximum wheel diameter 15 inches. Left rear tire maximum section width (sidewall to sidewall) is 19 1/2 inches. Maximum right rear wheel width is 18 inches. Wheel width is measured where the tire seats against the wheel. For wheels with bead locks, the measurement is taken with the bead lock installed. No plastic wheels. Wheel covers must be securely fastened.

6. Titanium or carbon fiber brake rotors are not allowed, must be steel or aluminum.

7. No cockpit adjustments permitted including adjustable shocks, weight jackers or wings.

8. Nerf bars, which offer adequate protection in the event contact with another car, are mandatory. Nerf bars and bumpers must be made of steel and be at least one-inch in diameter. Nerf bars must be bolted or roll pinned to the vehicle. No pop rivets may be used to fasten nerf bars, bumpers or wings. Nerf bars may not extend past outside of tires.

11. Total weight of car and driver may not be less than 1,500 pounds. Weigh in to be after any event or qualifying. Weight to be measured as car comes off of the track in the condition that it took the checkered flag. Any added weight must be securely fastened.

12. All cars must use either a driveline strap or a driveline hoop restraint constructed of .065 steel either welded or bolted to the chassis. Metal hoop restraints must react positively to magnet testing. The rear cross member used for mounting the steel driveline hoop must be constructed of .083 steel.

Fuel ––

1. Methanol only according to Federal Standard of Purity, Grade A or AA. No additives of any kind including top lube will be allowed in the fuel.

Body ––

Body should give the appearance of completely covering the car’s frame and should be fully painted. The hood or cowling need not enclose the sides of the engine. One-piece tail and fuel tanks permitted, must be streamlined. No side foils, rudders or panels are to extend beyond roll cage on any side. No body pieces to extend beyond or underneath front torsion tube except hood. Hoods are mandatory. The rib may not extend higher than 2 1/4 inches.

Miscellaneous ––

1. No titanium driveshafts.

2. No mirrors of any kind may be used.

3. The use of electronic logic processors (this includes traction control devices) to control any function of the race car, and/or any system for continuous gathering of data from any function of the race car for which intended use is computer downloading, is strictly prohibited. (Penalty: Loss of Driver/Owner points for the season and loss of all earnings from the event that infraction occurred.)

4. One way radios are mandatory at all times when you are on the track.

5. Pit parking in 410 pit area will be limited to:

a) Cars running both divisions.

b) Top 3 in drivers points from previous year.

c) Persons needing Handicap Accessibility.

Suggested Safety Equipment ––

A. Arm restraints

B. Driving uniforms, flame retardant with a minimum of two layers. Underwear, head sock, gloves, foot socks and shoes should all be flame retardant.

C. Driver’s seat fume deflector/heat shield.

D. Fuel Shut-off Valve.

E. Full face Snell approved helmet – no more than 2 years old.

F. Head Rest Padding

G. High-back (stock car style) seats.

H. Kill switch in reach or drive.

I. Knee pads or padded steering.
J. Minimum 3 inch wide seat belts, no more than 2 years old, mounted to frame with bolts or looped over frame tubes, belts traveling through bottom of seat. Minimum 3 inch wide shoulder harness, double over the shoulder, military shoulder straps with anti-sub crotch belts. Harness to go over horizontal tube located less than three inches below the top of driver’s shoulders.

K. Neck collars.

L. Right head net or support. Head net equipped with a quick release capability.

M. Seat mounted to the frame with a minimum of three bolts.

N. Windshield screens are highly suggested with a minimum of .090 screens.

O. Drive Line Shields

P. Head and neck restraints

ANY CAR, TEAM OR DRIVER NOT MEETING WILLIAMS GROVE SPEEDWAY SPECIFICATIONS, OR STANDARD RACING SAFETY PROCEDURES AND EQUIPMENT, IS SUBJECT TO AUTOMATIC DISQUALIFICATION AND /OR PENALTIES.