PRO STOCK 2012 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.
1. SAFETY EQUIPMENT
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.
Snell-rated SA2000, SA2005, SA2010 or SFI 31.1/2005 helmet required. Roll bar padding required in driver
compartment (Fire retardant recommended). 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 restraint system with no neck collar. Recommended: Fire retardant head sock and
underwear; and 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
(Y-type shoulder harness not allowed), must be mounted securely to roll cage, recommended to be no
more than one year old, maximum of 3 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.
3. BATTERY / STARTER
Batterymay 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 Left to Right proportioning allowed.
One Front to Rear proportioning device (brake adjuster) allowed.
5. HUBS & WHEELS
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
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.
No all steel body. At least front fenders and doors must be aluminum.
See Diagram on next Page.
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.
NO BOLTED SLAB SIDE BODIES (STRICTLY STOCK APPEARING BODIES, OR A POINTS PENALTY AND /
OR A FINE PER WEEK).
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
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 only!
No partial roofs.
No flat 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
Stock appearing nose pieces only. No altering of stock appearing nosepiece allowed.
No Late Model looking noses. No duckbill. Tires must be visible from front of car.
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
Weiand: X-Celerator Chevy 7547-1, Ford 7515, 7516 Chrysler 7545 Edelbrock: Torker / Torker II Chevy 5001,
5061 Ford 5021, 2760 Chrysler 5076
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.
11. DRIVE SHAFT
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, head to collector.
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’
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
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.
Gasoline Only. Racing fuel is allowed. No alcohol, no methanol, no E85 / E98. No performance enhancing
or scented additives. Fuel must pass both dielectric and chemical tests.
17. FUEL PUMP
Mechanical OEM type push rod fuel pumps only. No electric or belt driven fuel pumps allowed.
18. FUEL CELLS
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
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
Any type of radiator may be used. Must be in front of the car and not extend through the hood. Over Flow
Catch Can required (recommended 1 gallon capacity). No Antifreeze, water only.
No radios, EXCEPT MANDATORY RACECEIVERS, allowed in car, or with any pit member or anyone
connected with the racecar.
23. REAR AXLE
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.
24. ROLL CAGE
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.
26. SHOCK CLAIM
$50.00 per shock may claim any or all shocks, 1 claim PER DRIVER, PER SEASON. 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. Must finish on the lead lap to be eligible to claim. FAILURE TO SELL: disqualified for the
night, loss of points and money for that night only. Must qualify from rear most spot the following week.
This is intended to keep the cost of this class down.
NO coil over springs. NO torque arms or torque links. NO aluminum suspension pieces. All coil springs
must be over 4 ½" in diameter. Steel or composite leaf spring allowed. Front springs must be mounted in
stock location. No adjustable sway bars. Stock type mounted; steel cross shaft tubular upper control arms
are permitted. No 5th coils. Screw jacks are allowed. Heim joints must be all steel ¾" (minimum). No coil
over eliminator. All brackets must be welded on rear end. No swing arm suspension. 2 trailing arms, 1
pan hard bar, 1 pull bar or lift bar max.
P245 approved American Racer tires only. Must have MSPA stamp. 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. NO Bert or Brinn type transmissions. Must have a disengage-able drive train. NO direct
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.
31. WRECKER HOOKS
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. NEITHER WRECKER CREWS NOR RACETRACK
PERSONNEL WILL BE RESPONSIBLE FOR ANY DAMAGE DONE TO THE ANY VEHICLE.
Aluminum steering quickener allowed. No rack and pinion steering. Quick disconnect steering wheel
required. Collapsible Steering Shaft Recommended. No Straight Shafts.