Rule Book Disclaimer:

The rules and/or regulations set forth herein are designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirement for such events. These rules shall govern the condition of 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/OR REGULATIONS. They are intended as a guide for the conduct of the sport and are in no way a guarantee against injury or death to a participant, spectator, or official

The race directors shall be empowered to permit minor deviations from any of the specifications herein or impose any further restrictions that in his/her opinion do not alter the minimum acceptable requirements. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM SUCH ALTERATION OF SPECIFICATIONS. Any interpretation or deviation of these rules is left to the discretion of the officials. THEIR DECISION IS FINAL.

Penalties and policies will follow WISSOTA rules straight out of the WISSOTA rule book. The fine for illegal parts will be $250, 30 day suspension and loss of points at all tracks. If found to be illegal after the track point season has ended, loss of all points at all tracks will still apply. All tracks will support and enforce any suspension imposed by another track.


This class is designed for STOCK STREET CARS ONLY. NO high performance or racing parts allowed on these cars. Suspension, engine, and drive train must remain STOCK. Any areas not covered in below rules shall be left up to the discretion of the management. If in doubt…ASK. We will uphold the intent of the rules


Any American made car with a minimum factory specification of 112 inch wheel base.

No vans, trucks, station wagons or convertibles.

Minimum weight with driver: 321 cu in or less = 3400 lbs, 322-367 cu in = 3600lbs, over 367 cu in = 3800lbs. Weight must be painted, of contrasting colors, on top of LF fender/door, visible by scale operator.

Ballast (lead weight) must be secured to the car with 2 bolts a minimum of ½" in diameter. No ballast to be mounted inside drivers compartment.

No reinforcing, cutting apart, welding or modifications of anything on the vehicle is allowed except as specified.

All glass and burnable materials must be removed.

Hood may be gutted. Rear of hood must seal to cowl to protect driver from water and oil leaks.

Front wheel wells may be removed.

Doors may be gutted for door bars only.

No gutting of rear wheel wells, steel interior panels or trunk floor (see L-6, FUEL CELLS). Rusted areas may be replaced with 20 gauge mild steel.

All doors must be welded shut.

Engine must remain in original position. Firewall must remain unaltered and in stock position. All holes from removal of heater cores etc., must be sealed with metal patches.

A driveshaft hoop is required and must be located 6"-12" behind front u-joint. The hoop must be made of 0.25"x 2" steel and, if bolt-in type used, must be mounted with graded hardware. Hoop must be 360 degrees around driveshaft. No chain allowed. Drive shaft must be painted white.

Rear bumper must be stock mounted and tied to rear fender with straps.

No gutting of bumpers (front or rear).

A short piece of 3/8" chain must be bolted through a hole in the bumper and a hole in the frame to prevent the bumper from falling off. This applies to both front/rear bumpers.

Any stock front bumper is OK. You may replace your factory shock absorber mount with pipe no larger than 1.750" x 0.095" tubing and brace any bumper using the same material no wider than 48" behind the bumper. Straps from front bumper to fender are allowed and recommended.

Body must match frame and wheelbase.

Rub bars may be used on the sides of the car, but must be mounted to the body. They can not be tied to the roll cage. Rub bar maximum 2" tubing with tapered ends.

Sheet or roll plastic or an aftermarket nosepiece may be used but MUST be mounted ABOVE the stock bumper. Bumper may be covered but bottom must be able to be seen without getting under the car. NO plastic allowed below the bumper.

Hoop in front of the radiator must be either welded to the frame or bumper. If welded to bumper it must be recessed, from leading edge of bumper, 6"


A six (6) point roll cage is mandatory: one post by each windshield post and two behind the driver with all four connected at the top with a roof hoop. You must have an angle brace from the driver’s front hoop to the right rear of the hoop. You must have an angle brace running from the upper right corner to the lower left corner behind the driver. The two back bars must run from the top left and top right of the roof hoop to the rear of the car. A protective bar running from the front left cage post forward and down to the frame to protect the drivers foot area is mandatory. There should be a minimum of 3" from the top of the cage to the top of the driver’s head. See diagram regarding roll cage gussets.

Main cage must consist of 1.750" outside diameter tubing with a wall thickness of at least 0.095".

Minimum of four (4) 3/8" windshield bars.

Minimum of three (3) door bars on the left side, a fourth is highly recommended.


Each driver must have a fire extinguisher in his/her pit.

Aluminum racing seat only. No fiberglass seats. No composite materials. Seat must be mounted in stock location and not set back.

A tail light in the rear window is required and must be on at all times.

Must have a 5-point racing harness. Seat belts must consist of a 3" lap belt and double 3" shoulder belts that release with one mechanism.

A driver’s side window net is mandatory. Window net must be mounted with solid mount at the bottom of the window and latch at the top. Latch must be readily accessible by both driver and safety personnel.

Shoulder belts should be mounted a minimum of 6" lower then driver’s shoulders to keep the driver down in the seat in case of a rollover.

Seat belts can not be more than 5 years old.

Helmet must be a Snell approved full-faced helmet. All helmets must have at least a SA2000 rating. NO motorcycle helmets allowed.

MUST have fire retardant driving suit.

Neck brace made of fire resistant material is mandatory.

Fire resistant gloves and shoes are HIGHLY RECOMMENDED.


Stock cast two barrel intake ONLY. No porting, polishing, or gasket matching!

No Aluminum intakes. No carb adapters or spacer plates.

No porting of heads or intake or exhaust manifolds.

Flat tappet hydraulic camshafts only. No roller cams or roller lifters allowed. No mushroom or step lifters allowed. No machining permitted to install cam or lifters. Must be able to remove lifter from top of lifter galley at any time. No truing of lifter bore.

Stock type log manifolds only. No center dump exhaust manifolds. No Vortec Manifolds.

No double hump heads. No Vortec heads. (Casting numbers not allowed: 186, 461, 461x, 462, 492, 291, 432, 041, 040, 370, 10239906)

NO headers, NO roller cams, NO roller tip rockers, NO roller rockers.

Heads must match engine. For example: 305 heads on 305 block.

STOCK PISTONS. No flat top pistons in 400 cu in engine. No domed pistons. Cast pistons with 4 valve reliefs ONLY- NO forged pistons, no Keith Black Pistons. No floated or bushed rods allowed.

Pistons must sit below deck of block.

Head can NOT be angle milled.

Stock stroke. Crank must match block. No offset grind.

Rods must match block. No lightening, grinding, knife edging or polishing of any type.

Balancing is allowed.

STOCK two piece balancer only.

No aluminum other then stock for that engine. No aluminum water pump on chevy engine.

Valve seats may be ground no further then 0.250" below top of seat. Valve must match head being used.

Stamped steel rockers only. No stud girdles. No guide plates. Valley pans allowed.

Valve springs must be stock diameter for heads being used. No helper springs. No beehive springs.

Stock appearing oil pan. Pan to go with claim.

MAXIMUM engine compression allowed is 9.5:1.


One 2-barrel carburetor only.

No front-bowl Holleys. No marine carbs or intakes.

All carburetor components must be STOCK.

No milling or grinding allowed.

Choke can be removed but not the air horn.

Must have stock measurements.

No electric fuel pumps. No piston-style fuel pumps. Stock diaphragm only.

FUEL MUST BE PUMP GASOLINE ONLY. NO RACE FUELS ALLOWED! A maximum of 10% ethanol-enriched gasoline may be used. No alcohol, no nitrous oxide or nitro, no nitrous devices allowed. No methane or propylene oxide allowed.

Central Dakota Pure Stock restrictor plate required. Total thickness of gaskets and plate (from intake to bottom of carb) cannot exceed 0.625". Gaskets must be OEM replacement gaskets. NO plastic, wood, aluminum, or any other foreign material or homemade gaskets.

Gas pedal, including the use of a racing pedal. Must be mounted in stock location on the firewall.


Ignition must be either point system or stock electronics. No super coils. No billet HEI distributors.

NO multiple spark boxes (like MSD).


You are allowed to have 2 copper radiators, or 1 aluminum radiator.

Radiator (Stock or Aluminum) must be mounted to Stock OEM radiator support and remain in original position and be operable. The portion of the radiator support that extends outside the frame rail may be replaced with pipe to tie the fender to it. The portion inside the frame rails must remain stock.

Extra cooler may be used if using a copper/brass radiator. It must be mounted inside the car and shielded form the driver. Absolutely NO Aluminum radiators in the rear, stock or not.


Stock 3 speed automatic transmission only. Must be fully functional with three forward gears and working reverse. No lightening or removal of internal parts allowed.

No powerglides allowed. No straight stick (manual) transmissions allowed.

Only TH350 and TH400 transmissions allowed in GM. Transmissions in other brands subject to approval.

Transmission is subject to teardown/protest.

Stock diameter torque converter only. (stock to transmission being used)

No modified torque converters.

Welded rear ends are OK. 4.11 gears or less. Aftermarket mini spool allowed. No full spools allowed.

No inner marriage of rear ends and transmissions.


The battery must be moved inside the car and must be covered and securely fastened. (NO TARP STRAPS)

One battery only, must be 12 volt.


Brakes must be factory stock including master cylinder.

Drum brakes on rear of car only.

All cars must have 4 working brakes at all times.

Brake pedal must be of stock length for the make and model of car and must be stock mounted to the firewall.

No altering of suspension or steering. Steering shaft with u-joints or slip joint is OK. All suspension parts must match frame. Quick release steering wheel is recommended. No steering quickeners allowed.

No Racing shocks. No filing of numbers off shocks. Bilstein, Carrera, Afco, QA1 etc., "stock replacement shocks" are NOT stock shocks and are, therefore, not allowed. No "helper" springs on shocks (coil-overs)

Front springs must be at least 5" in diameter and at least 12" in length.

Springs must be stock mounted and rear springs must have pigtails on both ends.

All springs must be tight in the pocket without the use of any shims or adjusters. No sliders on leaf cars. No multiple holed shackles.


Fuel cells must be moved into the trunk area. Trunk floor may be gutted for fuel cell BUT no more then 2" around cell. If the fuel cell protrudes below trunk floor, a fuel cell guard will consist of a piece of tubing, minimum of 1.500" in diameter, 1" below the cell and from the frame rail to frame rail. The bottom of the fuel cell can not be lower than the bottom point of the stock frame rail. Fuel Cell must be mounted to the roll cage.

FUEL CELLS are Mandatory.

There must be a firewall between the driver and the fuel cell.

Fuel cell must be securely mounted using a minimum of two (2) 2" steel straps 12 gauge steel or thicker running in both directions across fuel cell.

Fuel cell must be in a metal container.


DOT Street tires (street designed) allowed no wider than 8" tread width, with P255/60/R15 being the largest tire allowed. NO series other than 60 allowed. Tires must be Passenger Series - no grips, snow tires, or truck tires. No defacing of tires. No grooving or siping of street tires.

Hoosier E-MOD, H-35, H-40, Dirt Stocker, and G-60 (with IMCA stamp) are the racing tires allowed. Tires must have 60% or less (6/32nds or less) tread on tire prior to a race-no tolerance. Racing tires may be grooved and siped. No Late Model or Sprint car style tires allowed.

If you have a racing tire on one corner of the car, then you must have the same tire on the other 3 corners.

If you have a flat tire you may not put the other kind of tire on the car without switching all of them.

Steel wheels only. May be race approved and would be recommended but not mandatory. 8" maximum width and only 2", 3", and 4" offsets allowed only. No 1" offsets.

14" or 15" by 8" steel wheels, chrome or white spoke.

NO beadlocks allowed. No wheel spacers. No wheel adapters.

5/8" (0.625") wheel studs are mandatory.


Cars must be neatly numbered using numbers from 1-99. Numbers must be at least 18" high and 10" wide with a body of 3". Numbers must be painted on the door on both sides of the car and the roof. A 6"x 6" plate with the number painted on it must be place in the front window and the rear window. All numbers must be of contrasting colors to the car. Do not incorporate graphics into your number. Simple block numbers using the above dimensions and of a contrasting color are the easiest to read. Do NOT paint number on the rear quarter panels. Do NOT use shiny reflective or prismatic type decals.


All cars will be kept neat appearing. Tin hanging off cars and/or sharp edges will not be tolerated.


Engine Protest Rule

Eligibility and Fees:

All race cars competing in the feature event are subject to being protested. Any driver competing in the feature event may protest providing his race car meets the minimum weight and is otherwise legal under the rules and he has registered his/her intent to protest with a track official prior to the start of the feature race and has tendered the required protest fee. The protest fee shall be $50 for either the top end or the bottom end or $100 for both. If after the tear down, the engine is found to be legal, 75% of the protest fee will go to the protested driver and 25% of the fee will be retained by the track. If after the tear down, the engine is found to be illegal, 75% of the protest fee will be returned to the driver who protested and 25% will be retained by the track.

Protest Procedure:

Immediately following the completion of the feature race, a track official will notify the driver of the relevant race car that his/her race car has been protested. The protested driver shall then proceed directly to the "claim area" where he/she will receive further instructions as to where the tear down will take place. A track official will be assigned to stay with the protested car until the tear down is complete.

Special Provisions:

Only the driver may protest. A driver may only protest one engine per race. Only the tech inspector has the final word on the legality of the race cars involved in the protest. No person shall prevent or interfere with the protest procedure. Only the driver and 2 pitmen from the protested car, the protesting driver and 1 of his/her pitmen and the appropriate track officials may be present at the tear down.


If an engine is found illegal, the driver of the protested car will forfeit all points and money earned for the event at which the engine was protested and will serve a 2-event suspension. The 2-event suspension applies to both car and driver. Refusal of a protest will result in the same penalties as above. In the case of a protest refusal, the protest fee will be returned to the driver who protested. A second protest refusal by the same driver in the same racing season shall result in loss of all points and money earned for the event at which the engine was protested, a 4-event suspension for both car and driver and loss of all points earned year to date.

Transmission Protest rule:

The fee to protest a transmission will be $100. The Eligibility, Procedure, Special Provisions, and Penalties will be the same as the Engine Protest Rule.

Engine Claim:

There will be an engine claim of $200 plus exchange. The claim must be made within 5 minutes of the end of the feature event. The claim can only be made by the driver and the claim fee must be in U.S. currency. The claiming driver’s engine must be in good, sound running order according to the track officials. In order to claim, a driver must be in the top 8 finishers, on the same lap as the winner and must not have been involved in causing a yellow during the feature event. The cars in the last two (2) places are ineligible to claim. The car whose driver is claiming must meet all rules and must weigh after the feature.

The claim includes everything except: carburetor, ignition, exhaust manifold, starter, water pump, fan belts and pulleys.

The refusal of a claim or the discovery of an illegal motor, transmission, clutch, intake, exhaust, or carburetor will result in a 30 day suspension for both car and driver and the loss of all points and money earned that night, as well as all points year to date and $500 fine. Suspension time must be served and fines must be paid before the driver is allowed to race again