Pro Stock/Sportsman

2015 Season

The 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 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 director shall be empowered to permit reasonable and appropriate deviation from any of the specifications herein or impose any further restrictions that in his 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.

Allowing Camaros in the Pro Stocks (1981 or older)



Rules apply at all times car is on track. An operational 2-½ pound minimum fire extinguisher with gauge visible for inspection purpose is mandatory in each racecar and tow vehicles. Extinguisher must be mounted in a quick release bracket. DUCT TAPE IS NOT AN ACCEPTABLE MOUNTING DEVICE.

Rules apply at all times car is on track. Snell-rated SA2005 or SA2010 helmet required. Roll bar padding required in driver compartment. Recommended: Fire retardant padding. SFI-approved full fire suit required. Fire retardant gloves, shoes and neck brace (or head and neck restraint) required. Right and left seat head supports required if using head and neck restraint system. Recommended: Fire retardant head sock and underwear, collapsible steering shaft. Driver-side window net required, minimum 16 inch by 20 inch ribbon or mesh style, and must be mounted to roll cage so latch is at top front of window. Minimum three inch (two inch with head restraint system) wide SFI-approved five point safety belt assembly required, must be mounted securely to main roll cage. Recommended: Safety belts no more than two years old. Any safety equipment physically or visibly wore or damaged must be replaced, regardless of age. All safety equipment must not be altered and must follow manufacturers use, specifications and requirements for installation.


Door number must be a minimum 4″ stroke, with 18″ height in CONTRASTING COLOR. Roof number must be a minimum 4″ stroke, with 20″ height pointed to passenger side of car. If we can’t read your numbers you will not be scored. A 6” car number visible from the front and rear of the car is required.


Battery may be located anywhere outside the driver’s compartment. It must arrive at the track fully charged, and must be securely mounted and the positive battery post must be covered. Starters must be in working order. All cars must start under their own power in the staging area or the will report to the rear of the event.

A clearly labeled Battery ON/OFF ‘KILL’ switch must be to the right of the driver and within drivers reach. This is for the Safety Crew to be able to kill power to everything.


Stock four wheel hydraulic brakes. All must be in working condition. Neal type brake pedal assembly permitted. Single piston, steel calipers only. No shut off valves. No ratchet valves. No Left to Right proportioning allowed. One Front to Rear proportioning device (brake adjuster) allowed. No pinched off brake lines. All Brake lines must be visible.


Eight (8) inch maximum, racing wheels and 1 inch racing / safety lug nuts required for all wheels. NO Wide 5s allowed. Bead Lock Wheel allowed on Right Rear Only, if running bead lock, right rear tire must have at least 17 pounds of air after race. Magnetic steel wheels only, no plastic or carbon fiber wheels allowed.


Windshield is optional. If used, windshield must be Lexan safety glass, or heavy screen. No Plexiglas. Use of Plexiglas will result in suspension for the night. This is subject to inspection. If no windshield is used a minimum of three windshield bars in front of driver are required. NO MIRRORS ALLOWED.


Aluminum or steel bodied cars ok.



 After market bodies are allowed.

 Spoilers max width is 68”. Spoilers max height is 8”. 8” total material, including top lip.

 Body must cover at least ½ of the tire, but not completely cover the tires.

 Tires must remain visible from front and back of car.

 No side windows or air deflectors allowed.


 Slab side car may have to add at least 50 lb. per side in front of bell housing.

 Maximum overall body width is 72”. Max body width at top (Deck and Interior) is 68”.

 All body sides from nose to tail on cars will have a visible bow outward and MUST have a break in bodyline.

 Minimum roof height – 45″, maximum deck height – 35″.

 All roofs must be from 41” – 45” long front-to-rear and 48″ – 54” wide side-to-side.

 Rounded and tapered stock appearing fiberglass roofs preferred. Performance Bodies # PER181080

 All roofs must meet all roof dimensions and must be stock appearing.

 No partial roofs, no tilted roofs, no dished out roofs.

 No wings attached to roof or to side posts.

 Must be a full roof.

 No built in fiberglass air dams.

 All roof posts must meet outside of car.

 Front roof supports to be 2″x24″.

 Side vents on front roof post can extend back no further than 16″ bottom, then straight up to roof for an L-configuration. Side vents must meet outside of car.

 Rear roof post supports must meet outside of car on a flat straight line, and be stock appearing. Top width between 8” – 12”. Bottom width between 18” – 24”.

 Rear roof post must be 32″ or greater from the rear of trunk.

 Stock appearing rear sail post must be pre approved, OEM size, and same make and model as nosepiece.

 No Late Model looking noses. Max 2” duckbill.

 Stock appearing nose pieces only. Performance Bodies Classic Dirt Nose (#PERC1X040) and Formed Plastic Sides (#PER20X23X) preferred.

Flares or add-ons to nose piece can not be higher than front fenders.

 Front bumper and nose must be within 45″ from the center of the front wheel and the rear bumper must be within 45″ from the center of the rear wheel.

 Front & Rear bumpers not to be wider than body, but must fill area inside panels, tolerance, 2″ each side.

 All Pro Stock cars MUST have a rear panel 8″ minimum height, complete side to side, at 90-degree angle. Must be solid. May have up to a 6″ fuel filler door.

 Rear bumper cannot extend more than 8″ behind body.

 Bumper heights must be 18″ + or – 2″ from ground.

 All structural tubing must remain inside body.

 Driver must be able to exit from both sides of car with helmet on.

 Interior of car must be 13 ½” below roll cage minimum and all area of roof, from front window to behind driver’s seat. No area of the interior of cockpit can be less than 13 ½” below the roof and roll cage for safety. Easy exiting of car from either side. Windows must have 13 ½” of clearance straight up and down. No support bars blocking right exit from cockpit allowed.



ONLY 1 Holly #4412–2 bbl (500 not 750) carburetor will be allowed. Absolutely no alterations or modifications to carburetor, except for removal of choke plate. Choke horn cannot be removed. Altered carburetors will be CONFISCATED! No transverse mount carburetors allowed. Carburetor must be mounted in conventional manner with float bowl facing forward. Carburetor adapter/spacer allowed, maximum thickness (between carburetor and intake) including gaskets is 1.20 inches.

Top 10 may have to pull carburetor after every feature. Inspection Gauges will be used.


Must have 1 inch minimum inspection hole in intake to view camshaft and lifters.

Stock OEM cast iron or OEM aluminum low rise intakes allowed. Rise of stock intake above engine block can be a maximum of 4.00 Inches. To figure intake rise height, add “A” + “B” and divide by 2. Example A is 3.7”, B is 4.1”. (3.7+4.1) / 2 = Intake Rise Height of 3.9”

Aluminum aftermarket intake manifolds will be allowed. Only the following current aftermarket intakes are allowed

Weiand: X-Celerator Chevy 7547-1, Ford 7515, 7516 Chrysler 7545 Edelbrock: Torker / Torker II Chevy 5001, 5061 Ford 5021, 2760 Chrysler 5076

Professional Products : Cyclone Chevy 52001, 52007


No (in and out) boxes, all gears must be clutch operated (with motor running and car in still position, driver must be able to engage car in gear and move forward and backward at time of inspection). Clutch must be inside of bell housing.


Magnetic Steel drive shaft only, must be painted white and have a steel drive shaft loop measuring 1/4” thick by 2 inches wide, located on the forward 1/3 to prevent it from dropping onto the track.


Stock American engine. No cubic inch limit. The forward most spark plug hole may not be set back any further than a perpendicular line with the center of the upper ball joints for each manufacturer. Roller tip and full roller rockers allowed. No roller camshafts. Intake must have a 1” minimum inspection hole to view camshaft and lifters. NO ALUMINUM HEADS OR BLOCKS.


Mufflers are MANDATORY .100-DECIBEL LIMIT. MUST BE AT THE END OF EXHAUST, may be added to your current system. NO turndowns. Mufflers must be welded securely in place. Loss of muffler may result in disqualification. Headers are allowed, 1 ¾” maximum primary tube diameter header. No Cross Over Collector Headers Allowed. All 4 exhaust ports from 1 head must be collected within same collector. The 1 ¾” maximum primary tube rule must be maintained until the point where all 4 exhaust ports from one head are collected together.


The firewall at the front of the cockpit shall be a wall of protection against a fire from the engine compartment. It shall be tightly solid from top to bottom. Not allowing airflow from the engine compartment to the cockpit. Mandatory: 1/8 inch steel or ¼ inch aluminum plate must be used for drivers’ floor.


Any 1965 or newer rear wheel drive American made car is permitted in this class. No station wagons or four-wheel drives. All Pro Stocks will have minimum 102″ wheelbase. All vehicles will be stripped completely of interior, except driver’s seat which will be securely fastened to the roll cage, and will be equipped with a head rest or a high back racing seat and will be subject to local track inspection. The front sub and rear clip may be connected with MINIMUM 2″x2″ square tubing or minimum 1 ¾” round tubing. All spring and shock mounts must be in stock position.

CAMARO AND FIREBIRD FRONT SUB FRAMES OR UNIBODIED CARS MUST BE 1981 OR OLDER. NO EXCEPTIONS!!! Rear portion on unibody cars, starting at the leaf spring mounts, may be fabricated or reinforced.

ONLY TWO REPLACEMENT FRONT SUB’S ALLOWED. Howe’s part #358-8-01, Phone # 989-435-7080. Port City # 100-2-205 Ph # 800-472-2464. IF USING AFTERMARKET SUBS, 50 LB. WILL BE ADDED TO FRONT OF CAR, 25 LBS. ON EACH SIDE, IN FRONT OF BELLHOUSING.

16. FUEL

Gasoline Only. Racing fuel is allowed. No alcohol, no methanol, E85 / E98 is ok. No performance enhancing or scented additives. Fuel must pass both dielectric and chemical tests.


Mechanical OEM type push rod fuel pumps only. No electric or belt driven fuel pumps allowed.


Fuel cells are mandatory. Tank construction, location and mounting are subject to inspection. A leaking tank is grounds for disqualification. Must have bladder and check valve on fill pipe. Must have canister around tank. Must have approved loop behind the fuel cell, minimum eight (8) inch clearance. Gas cap MUST be secured to fuel cell by cable, chain or tie strap. MUST HAVE ROLLOVER VALVE IN VENT TUBE OF FUEL CELL.


Hoods must be securely fastened, subject to track inspection. An air cleaner and fire arrestor are mandatory.


Distributor must be stock appearing and accept stock distributor cap. No after market dual point ignition or magnetos allowed. No crank fire ignitions. No adjustable ignition control devices. No timing retard controls, or digital gauges (including tach). No electronic monitoring computer devices capable of storing or transmitting information except analog tach. Only stock manufacturer bolt on type parts allowed. Example: MSD or Accel replacement coils or modules allowed providing it fits in stock location. You are allowed ONE Unaltered 12 Volt Ignition System. Ignition must be out of reach of driver and be accessible for tech inspection. One box, One Coil, and One Single Point Distributor. Only Ignition Boxes Allowed Are: MSD 6A p/n 6401, MSD 6AL p/n 6425, Crane HI-6N Oval track Ignition, p/n 6000-6410, Accel 300+ Ignition w/rev limiter p/n 49300. MSD E-Curve Distributor is not allowed. No electronic traction control devices.


No radios, EXCEPT MANDATORY RACECEIVERS, allowed in car, or with any pit member or anyone connected with the racecar.


Any steel approved OEM passenger car or truck non-cambered rear end (housing and carrier) allowed. Safety hubs (floater) allowed. All components must be steel, exceptions are: lowering blocks, axle cap, and drive flange may be aluminum. No adjustable lowering blocks. One inch inspection hole in housing required. Full steel spool, steel mini spool or welded rear end only. Steel axles only. No quick change devices. One piece drive flange only. No torque-dividing differentials. No Gold Tracks. No Lockers. No scalloped ring gears.


Must be Grand National design with upright supports. Must have halo bar. Four door bars are required in the driver’s door. Cage construction should be a minimum of 1 ½” OD seamless DOM tubing (.095). No aluminum tubing. The driver’s seat must be securely fastened at bottom and back of the roll cage, using seat manufacturers’ specifications. Drivers head may not extend above roll cage with helmet on. Must have steel plate 18″ x 24″ x 1/8″ in the driver’s door, must have steel plate 6″ x 12″ x 1/8″ behind the seat in front of the trailing arms.


One shock absorber allowed per wheel. No air coil-over or struts allowed on the front. Steel racing shocks are allowed on the front and rear. One 90/10 shock allowed, mounted from top of rear end housing to roll cage.


$50.00 per shock, may claim any or all shocks, 1 claim PER DRIVER, PER SEASON. Driver that finishes feature on the lead lap may claim anyone in the top 4. MUST BE IN WRITING and given to tech inspector in the tech area within 5 MINUTES of end of the feature. FAILURE TO SELL: disqualified for the night, loss of points and money for that night only and must qualify from rear most spot the following week. This is intended to keep the cost of this class down.


NO aluminum suspension pieces. All coil springs, front and rear, must be over 4 ½” in diameter. Front springs must be mounted in stock location. No adjustable sway bars. Stock type mounted; steel cross shaft tubular upper control arms are permitted. Screw jacks are allowed. All heim joints must be steel, ¾” (minimum). NO coil over springs. NO torque arms or torque

links. Steel or composite rear leaf spring allowed. No 5th coils. No coil over eliminator. No swing arm suspension. All brackets must be welded on rear end. Only 3 type of rear suspension allowed, traditional 3 Link (2 trailing arms, 1 pan hard bar, 1 pull bar or lift bar max), traditional Leaf spring rear suspension and stock 4 link suspension.


American Racer P245/70D-15 tires only. Tire must have MSPA stamp. No Hoosiers, no McCreary. Chemical alterations, vulcanizing, tire softening, defacing and/or altering the face of the tire lettering and/or tire stamping will not be permitted. Chemicals or tire softening is not permitted at any time. Tires may be inspected at any time. Tire pressure must be at least 17 lbs on right rear if running bead lock wheel, after each race.


Any transmission, manual or automatic. NO quick-change transmissions. Must have scatter shield or protective plate 180 degrees around clutch. If L-plate is used, 1/8” steel plate is minimum thickness that will be allowed. BERT AND BRINN TYPE TRANNYS OK


3,000 lbs minimum. Added weight MUST be in plain sight, painted white or silver, MUST have the car number painted on it in a contrasting color and must be readable. No cement pellet or liquid style weights. Weights must be securely mounted to the car with the minimum of two (2) ½” bolts and nuts per 50 pounds of weight. Loss of any weights may be grounds for disqualification. No weight on rear bumper or outside body of the car.


MANDATORY – FRONT AND REAR. Cable or chain preferred. Tow hook cannot extend in front of car. Both must be easily accessible. If there are no wrecker hooks on the car, it will be pushed, towed, or dragged to the infield until after the racing program is completed.



Aluminum steering quickener allowed. No rack and pinion steering. Quick disconnect steering wheel required. Collapsible Steering Shaft Recommended. No Straight Shafts. Must have minimum ONE knuckle in shaft.