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Extreme 4 (FWD Stock) 2020

2020 Stock FWD

Rules and/or regulations set forth herein are designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirements for such events. These rules shall govern all events, and by participating in these events, all participants are deemed to have complied with these rules. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM PUBLICATIONS OF OR COMPLIANCE WITH THESE RULES and REGULATIONS. They are a guide and are in no way a guarantee against injury or death to a participant, spectator, or official. Harris Speedway retains the right to make all decisions and reserves the right to make any rule changes/amendments with dispute or appeal.


2020 Stock FWD


1. 1980 OR newer front wheel drive, 4-cylinder passenger cars only. No all-wheel drive or all wheel steering allowed. No vans or pickup trucks.

2. Body must maintain original dimensions, standard as from the manufacturer. Original body material may be patched/replaced with sheet metal as long as original body lines remain. Horizontal trunk lid surface must appear stock rear may be open. Nose pieces are allowed.

3. Floor pan, trunk pan, front and rear interior wheel wells must remain stock and in stock location.

4. Interior trim must be removed. (Carpet, head liner, interior side panels, etc.). Any material which is flammable must be removed.

5. Hood must be held shut with at least two hood pins.

6. Must add at least 3 crash bars in front of driver. All glass must be removed from car.

7. Fabricated dashboard OK. Sheet metal interior OK. Must have a minimum of two access holes for inspection.

8. Rear and passenger seat must be removed and a minimum 20-gauge sheet metal cover to form a rear fire wall installed to seal rear area of inside of car from trunk area.

9. Doors must remain in stock location. Sheet metal doors OK.

10. Inner fenders/wheel wells must remain stock and unaltered. Must have full floor pan. May be patched to repair rust or damage.

11. All vehicles must have seamless tubing 4-point roll cage with X braced hoop behind driver and a minimum of three door bars with vertical bracing from top to bottom. Where bars connect to frame must be a minimum 1/4-inch steel plate welded to frame in a secure and safe manner. Front and rear bars OK but cannot protrude beyond bodywork. Main components of 4-point cage and driver's door bars must be at minimum 1.5”x.095” tubing.

12. Aftermarket wing/spoiler OK on rear of car.


13. NO PERFORMANCE ENGINES. Stock 4-cylinder engine only. Maximum displacement of 2.2 Liters. No variable valve timing engines. Engine must remain stock as delivered by the factory and must remain in stock location. No Cosworth or rotary engines. No turbocharged or supercharged engines. ABSOLUTELY NO NITROUS. All engines must be for the make/brand of car for which they were manufactured. No engine components can be lightened, altered, or modified in any way. ARP rod bolts, head studs, aftermarket gaskets o.k. but must be stock thickness. No performance gaskets or spacers. No high-performance components, factory or aftermarket, will be allowed in the engine or drive train. Stock carburetor or fuel injection system for the make of car being competed only. No high-performance fuel injectors or fuel pumps. Factory air box with factory type filter (washable okay) and factory piping in stock location required. Cone type air filter may be used but must be attached directly to throttle body. If cone style filter used, stock airbox and piping may be removed. Only water allowed in radiator and cooling system. No antifreeze permitted. May remove exhaust pipe and mufflers. Exhaust manifold must remain stock with pipe extending beyond the driver’s seat, parallel to the ground. Cast iron manifold only. Headers allowed only as delivered from factory for make/brand of car. All flywheels must be stock as delivered from factory. Saturns with 1.9L engine may lighten factory flywheel to 13lbs. All transmissions must have all working gears including reverse. No lightening or removal of gears or transmission components. Open differentials may be welded.


14. Up to 2.0L 2100lbs
2.0L and up 2200lbs

Any vehicle that uses an engine other than that delivered from factory must add 50lbs.
25-pound weight break for each of the following; certified head and neck restraint, full containment seat, and/or certified fire suppression system with a minimum of 3 nozzles (one in engine bay, one in driver’s compartment, one at fuel cell/fuel tank).


15. Only stock suspension parts allowed. Drilling or cutting of the stock suspension parts for camber is OK but must be performed in a manner deemed safe by tech officials. Safety hubs OK. Car may be lowered with stock parts only. No performance shocks/struts, O.E. replacement or equivalent only. No adjustable coil overs. Stock shock location only. Cannot move where shock/strut mounts to car.


16. Must have functional OEM front brakes. Rear brakes may be removed. No bias adjusters or shut offs allowed.

Wheels and Tires

17. All wheels must be the same size and offset. 7-inch wide maximum. No racing wheels! May run beadlock on right front. Tires must have DOT stamp and legal for highway use. No performance, trick, gumball, fancy or exotic tires of any kind allowed. Track reserves the right to disallow any tire from use in competition in this class.


18. SFI or FIA approved racing seat with minimum 5-point harness required. Harnesses must be SFI or FIA certified and must be in date. Fire extinguisher with gauge, mounted in quick release harness in reach of driver is mandatory. Racing helmet with SA2015 rating required. No motorcycle helmets.

19. Anything to promote safety may be added with approval from tech man.

20. If stock fuel tank is ahead of rear axle it may be used or replaced with a fuel cell. If stock tank is behind rear axle it must be replaced with fuel cell enclosed in a steel can mounted securely in center of trunk. In either case there must be a metal firewall between fuel tank and drivers’ compartment.

Buy Rule

21. ENGINE COMPUTER ONLY $150. Only top five eligible to buy computer, furthest car back gets first choice to buy.

22. ENGINE BUY RULE $1,500. Only the car behind can buy.

23.Three items only head, intake, bore and stroke. Overhead camshafts and gears will be considered part of the head. $300 with track retaining $100. Any car refusing protest will forfeit all money and points for the night. Tech man has final say. Must finish directly behind the car in order to protest.

24.Visual protest $25 must be presented to the tech man in writing 30 minutes before the main event.

25.Top five cars will be visual inspected directly after the main event each week. All cars may be subject to random inspection at any time.

26.Complete engine protest $500


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© 2014

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