Extreme 4



1. Must be a stock 4 cylinder car

2. No turbo or rotary engines allowed

3. Stock-type fuel injection or stock manufactured carburetor only (Motorcraft, etc...). No Holley, Weber or other racing carburetors allowed carburetor must be stock for the car.

4. Motor must be stock appearing and in stock location

5. Motor must match car (ex. Honda must have Honda engine)

6. Any air or oil filters (K&N, etc.)

7. No cold air intakes for fuel injections - must be stock type breather system

8. Aftermarket radiators okay - radiators can be braced for support

9. No aftermarket (racing) headers. Factory production header allowed without any tuning alterations.

10. Computer may be chipped and/or tuned.

NOTE: It is helpful to have a manual for your make and model car or truck if you are concerned that a question will come up in post race inspection.

Weight Rules:

1. All cars must weigh 2,200 pounds with car and driver after the race

Body / Wheel / Tire Rules:

1. Any front or rear wheel drive car or truck

2. No all-wheel drive cars / trucks or all wheel steer cars

3. Must have stock rear and front suspensions as from factory

4. No racing springs (lowering) or shocks allowed

5. Stock production cars only

6. Mirrors are allowed

7. Must have a quality welded 4 point roll cage inside the car with a minimum of 0.95" thickness tubing - USRA has final say in safety of the cage

8. Minimum 3 door bars / 2 side door bars - 6 point cages okay

9. No push bars past firewall

10. Racing seat, racing fuel cell and window nets are highly

11. 5 point harness /seat bolted to the roll-cage not the floorboard

12. Spoked aftermarket wheels allowed - 7 inch maximum

13. Street legal DOT tires required. No drag radials, mud grip lug tires, racing tires or racing recapped tires allowed

14. Tires can be mixed and matched for stagger - any standard DOT street tire - Regular car tires only - No Hoosier street tires or racing recaps - must be standard street tires. Directional tires are allowed.

15. Aftermarket nose pieces allowed

16. 6 inch metal support to extend out behind nosepiece or to hold grill
in place allowed

17. No push bars to extend beyond nose piece.

Miscellaneous Rules:

1. USRA has final ruling on all questions of legality. A pre-race inspection will be made to ensure SAFETY only.

2. Questions of legality can and will be answered during the pre-race inspection if asked by entrant. No guarantee of legality shall be expressed or implied during pre-race inspection. Legality will be determined in POST-race inspection.

3. Competitors must present cars for inspection prior to participating in any racing event.

4. Drivers are required to wear a racing helmet. Fire resistant gloves, uniform and shoes are highly recommended.

5. No radios allowed

6. RACEceivers or a like device is mandatory at all times on track.