Racer Area



These rules are designed to provide fair competition as well as a high level of safety. The importance is on keeping this class of cars inexpensive to build while providing for the safety and fun of the participants. It is the driver/owners responsibility to ensure his/her car is legal. If there is any question about rules contact the Tech.

Permissable Vehicles

  1. Any 4 -cylinder domestic or import, North American model, stock production car (this means that the car must have been available new in North America). No trucks, rotary engines, convertibles or four-wheel drives.
  2. Must have complete stock factory body. Bumpers must be mounted by the stock method and have three metal tabs, minimum 2” X 4”, to prevent loss during competition. One tab to be located at each end of the bumper cover with the third tab to be located at the center point of the bumper.
  3. Only factory installed spoilers are allowed, no aftermarket parts. Sunroof openings to be enclosed with sheet metal of an equal thickness (gauge) to the surrounding roof panel. Factory steel sunroof s acceptable, all glass to be removed. Holes and repairs to interior/exterior metal panels to be made with minimum of same gauge metal as the area/part being replaced. Aluminum is not allowed as a repair material.
  4. Body parts lost or destroyed during racing must be replaced by the next race day. No gutting of interior sheet metal. No bracing allowed. No sharp edges.
  5. Exhaust must exit from under the car, behind the driver, and be equipped with a muffler.
  6. Must meet the 95-db track noise rule.
  7. Cars to be painted any bright color with contrasting numbers.
  8. Doors to remain the color of the body with a min. 18” high number in a highly contrasting color (yellow door-black number, black door-white number).
  9. No design or decoration other than the number is allowed on the doors. Roof numbers, if used, to be 36” high (or as large as roof area allows).
  10. A 5” high WHITE number is required on top right front corner of windshield

Safety - Fire Safety, Modifications & Safety Gear

  1. An approved SFI-1 single layer or better fire suit is mandatory. D.O.T. or better helmets and neck braces are required.
  2. All flammable interior items must be removed except the dashboard, steering wheel and pedal assemblies. These must remain stock for year, make and model of car.
  3. All glass except the front windshield must be removed. No loose glass/debris to be left in the car (vacuum it out).
  4. Cars with a gasket style (non urethane or glued) windshield mounting method must have four tabs riveted to the body on the outside of the glass.
  5. If the car is equipped with an air bag system it MUST be removed. All under hood/trunk insulation and flammable material must be removed.
  6. An approved aluminum race seat is required. Seat must have a brace to support the shoulder area of the seat. Brace to be welded to the roll bar/cage and be bolted to the seat with a minimum of two bolts.
  7. A fully charged 2 ½ lb. fire extinguisher mounted within easy reach of the driver is required.
  8. Metal style mounts. Mount must be bolted or riveted, NO sheet metal screws. A 3” wide 5-point race harness mandatory. Must be properly positioned and mounted using the factory seat belt bolts or min. ½” diameter grade 5 or better bolts.
  9. A 3” wide 5-point race harness mandatory. Must be properly positioned and mounted using the factory seat belt bolts or min. ½” diameter grade 5 or better bolts.

 Bars & Roll Cages

  1. Minimum single hoop roll bar with cross brace and two down bars is required. One end of the down bar to be welded to the top of the roll bar and the other end of the down bar to be welded to the front face of the rear suspension mounting structure (see diagram).
  2. A four point cage may also be used if approved by Tech. but may not be used to stiffen the car.
  3. Minimum of two horizontal bars with two vertical support bars on the drivers’ side, minimum one horizontal bar on the passenger side.
  4. Roll bar/cage material is to be a minimum of 1 ½” O.D. X .120 wall steel tubing. Tubing material only, no pipe material. Proof of material used may be required and is the responsibility of the driver to provide. NOTE: Before you build check with Hornet Tech. to be sure you meet the safety requirements.
  5. No interior panels to be gutted to accommodate cage installation. No cage structure to extend forward of the engine firewall or rearward of the rear suspension mounting structure.
  6. Absolutely no other bracing allowed.
  7. Gussets recommended where tubing is welded together. All welds to be of good quality and must be as complete as possible. NO tack welds! If the roll bar/cage is bolted to the floor pan, 4” X 4” X min. 1/8” thick steel mounting plates must be used with a corresponding plate under the floor pan. Minimum of two, ½” diameter, Grade 5 bolts to be used.
  8. Cars built with the upright/t-bar systems prior to the 2009 rules implementation will be allowed to continue competing but it is strongly recommended that drivers of these cars update to the new minimum standard.


  1. Must have two drivers’ door reinforcements, minimum 4” channel, and extending as close to 6” ahead of and 6” behind the door opening as possible without entering the wheel well areas. Channel must be bolted with min. ½” diameter grade 5 bolts and large washers to the “A” pillar (windshield) and the “B” pillar (door latch pillar).
  2. Channel must be mounted on the exterior of the door and each end must be cut at a 45-degree angle.
  3. Angled area must be capped with minimum 1/8” thick steel plate welded to the channel. Top channel must be mounted midway up the door. Lower channel to be mounted with the bottom edge of the channel no higher than 4” above the lower door seam.
  4. Passenger door must be chained (min. 3/8” chain) shut but must still be able to open for Safety Personnel. Use a snap type (carabiner) clip, not a bolt, to secure the chain.
  5. An approved window net is required on the drivers’ door. The window net must be in good condition. No frayed, cut, repaired or otherwise modified nets will be allowed. Net must be mounted with min. 3/8” diameter solid, unthreaded steel rod, no re-bar. Net must be latched at the top (roof) and open downwards. Window net mounts to be welded or bolted. No hose clamps, rivets or sheet metal screws to be used.

Radio, Horn & Brake Lights

  1. No two-way radio/phone communications between the driver and the pit or the grandstand areas.
  2. Car must be equipped with car horn and radio/speakers.
  3. Must have third (high mount) brake light in working condition. A clearance or similar style light may be used if the car was not originally equipped with a third brake light.

Frame, Suspension & Brakes

  1. Stock factory frame and suspension.
  2. O.E.M. replacement parts only.
  3. The maximum right front camber allowed is 1/4 -inch measured with a straight edge against the tire. Measure to the top edge of the rim lip from the straight edge and the bottom edge of the rim lip from the straight edge. The difference is NOT to exceed ¼-inch. This allowance DOES NOT mean you can use adjustable camber plates or mounts, slot factory mounting holes or otherwise modify the factory mounting points to achieve the ¼-inch measurement.
  4. No heating, bending or modification of any type is allowed on suspension pieces. Factory part numbers to remain intact or part will be deemed illegal.
  5. Four wheel working stock brakes. Absolutely no altering of any brake component. Removal of hand brake is permitted.
  6. If found in violation of this measurement by Tech you will not be allowed to race until the necessary corrections have been made.
  7. All other caster/camber measurements to remain as per factory published specifications. No clamps, adjusters, spacers or chain allowed. No added bracing allowed.

Tires & Wheels

  1. Approved D.O.T. 65 series or larger passenger tires only.
  2. Tires must have a 200 tread wear rating or better. There must be tread on the tires. No bald spots, separating or bald tires. No tire treatments or softeners allowed.
  3. Mass produced steel or aluminum wheels only.
  4. Offset/backspace not to exceed factory specification for model.
  5. No spacers of any kind.
  6. No broken or missing wheel studs or nuts.
  7. All four wheels and tires must be the same size.
  8. No pound-on wheel weights.

Engine, Transmission & Cooling

  1. Engine, top of engine to bottom of oil pan, must be stock for year, make and model of car. You must be able to show Tech. the engine and head casting numbers to verify that the engine/head combinations are stock for your application.
  2. If the engine needs to be replaced, it must be replaced with the same engine as originally equipped if available. Any substitutions MUST be approved by Tech. prior to installation.
  3. Maximum 155 horsepower rating as originally advertised by the manufacturer . Any modification from stock must have prior Tech. approval. Absolutely no performance enhancing modifications.
  4. Engine must be equipped with the complete, factory stock, enclosed air cleaner/filter assembly. No cutting or modifying of the air cleaner assembly. O.E.M. paper filter elements only.
  5. On cars equipped with a timing BELT a 2” diameter hole must be cut in the timing belt cover to allow for cam gear inspection. On cars with a timing CHAIN a hole is not required but the valve cover/timing cover MUST be removed for inspection when requested by Tech.
  6. No turbo or superchargers.
  7. Transmission must be stock for year, make and model of car.
  8. No synthetic oils of fluids.
  9. No anti freeze.
  10. 10.  No fuel additives - pump gas only.

Battery & Gas Tank 

  1. Battery must be securely fastened with a min. 1/8” solid steel strap/bar and must remain under hood in the factory location.
  2. If the stock gas tank is located in front of the rear axle assembly it may remain.
  3. If the stock gas tank is behind the rear axle assembly it must be removed and mounted in the trunk/hatch area. A fuel cell may be used in place of the stock gas tank.
  4. Stock tank or fuel cell must be enclosed in a metal box with a ground strap from the filler neck to the body if relocated to the trunk/hatch area. Tank must be securely fastened with two 1/8” by 1” wide metal straps.
  5. A full metal firewall must separate the trunk/hatch area from the passenger compartment if the gas tank has been relocated inside the vehicle.

 *The decision and final ruling of the Track Officials will be through their interpretation of these rules. *Non-conforming cars will not be allowed to compete.
All competitors must adhere to the Hornet class rules, as well as the MotoPlex Speedway rules and regulations. *Track Officials reserve the right to refuse to allow a car to compete if the car is considered unsafe due to excessive rust, structural or accident damage. Line-ups and direction of racing will be decided by the Track Officials.

Violation of any of these rules as posted may result in loss of daily points, trophies, and monies. Serious or continued violations may result in suspension of racing privileges for a period to be determined by the Track Executive.