1. Cars must utilize a street-type American made chassis (1965 or newer). 105" minimum wheelbase. 3100 lbs. base weight minimum at all times, including after race with driver (no refueling after race). Maximum left side weight is 57.5% at all times. Cars must utilize factory frame sections from front steering box mount to rear of rear spring pocket. No widening of the frame in any way. The cross member must remain the OEM Stock component and in OEM location but may be modified for oil pan or fuel pump clearance. Weight jacks OK. Anyone using cups and stock mount shocks may deduct 25 lbs. Leaf spring cars must have stock frame to front of rear leaf spring.

2. Standard automatic transmissions with working torque converter or an OEM manual transmission and minimum 7.25" clutch with a 25 lb. penalty. Drive shaft loop required.

3. No oil coolers in driver's compartment. Battery must be properly encased.

4. No aftermarket lower A-frames (OEM mounting towers only). No aftermarket or made for racing spindles. Must be OEM style spindle. Standard aftermarket upper A-frames may be used with a 35 lb. penalty. No aftermarket trailing arms (single chassis mounting point only). 3-link or panhard bar set-up 75 lb. penalty. Shocks must be steel, economy-type, may not be externally adjustable and may not be gas re-chargeable (any shock may be claimed for $75). Ford 9" rear ends OK. No quick-change rear ends. Maximum 78" tread width measures from outside of tire to outside of tire at spindle height. No driver adjustments besides brakes. Stock-type, steel brake calipers only. Stock-type sway bars only.

5. Maximum 8" wide steel wheels only. Tires must be 8" Hoosier Comanche. NO SOAKING!

6. Engine must be cast iron (block & heads). Aluminum intake may be used with a 50 lb. penalty. If aluminum heads are used 75 lb. penalty. Headers may be used with a 25 lb. penalty (no 180's). Engine must be located so the spark plug of the forward most cylinder is equal to the centerline of the upper ball joints. Exhaust must exit behind the driver and must exit beneath car or under frame.

7. 2 or 4 barrel carburetors only, but dual-line or double-pump carburetors with rear metering block 100 lb. penalty. One spacer plate or adapter not to exceed 1 1/4 inches with gaskets. A fuel cell is mandatory and cannot exceed 22 gallon capacity. Fuel line must be standard in its size and length.

8. All cars must have stock firewall and floor-pan in place. Cars must have factory steel hood, roof, fenders, and upper portion of 1/4 panels. All other body panels must be made out of steel. If not steel 75 lb. penalty. GM to GM, Ford to Ford, Mopar to Mopar for chassis, body and engines. Aftermarket bumper covers must cover all bumpers and brace supports and all metal must be behind and covered by the cover. Must run a stock-type bumper if no bumper cover is used. Roofline must have stock appearance ("chopped roofs" may result in additional weight penalty). Side windows may go no further back than 15" from the corner of the A-post and must go straight up at a 90 degree angle from the door. Rear bumper/tail-light area must be enclosed (no open tail sections). No spoiler or hood scoops allowed (regardless if they are stock or aftermarket). No rear windows. No holes cut in hood for air cleaners.

9. Roll cages must not offset and must be perimeter type. Installation is subject t technical approval. A four-point roll cage is mandatory and must be constructed of 1 3/4" x .095 steel tubing. The width of the top roll cage bars (halo) must be a minimum of 75% of the width of the frame rails where the cage attaches. The cage must go straight up the doors before a slight angle to the roofline. Side plate on driver's door must be used and must be a minimum of 12" high, post to post, 1/4" thick and either be welded to the cage or fastened with six 1/2" bolts. Resilient roll-bar padding must be used on any roll cage piece that can be reached by any extremity of the driver. A minimum of 3 protection bars (minimum 1/4" wide round stock) in front of driver in the windshield area are mandatory.

10. A full fire retardant suit, racing gloves and Snell 2000 or newer helmet is required. A suitable form of neck restraint must be used (a neck collar at minimum). An aluminum racing seat with belt no more than 3 years old. Window nets are mandatory. Additional weight must be securely bolted to car and painted white with car number displayed. All safety issues are subject to approval by tech officials. All drivers must utilize a RaceCeiver for safety directions from the tower. Other radio communications are not allowed. You must purchase your own RaceCeiver.

11. Frame & body height minimum 4". 

12. Columbus Motor Speedway Sports Stocks permitted and must weigh 3,150 pounds with 57.5% left side weight. 

13. No back glass or spoilers permitted.

14. The maximum car weight, including all penalties will be 3,500 lbs.

The race director shall be empowered to add weight or permit minor deviation from any of the specifications herein or impose further restrictions that in his opinion do not alter the minimum acceptable requirements.  NO expressed or implied warranty of safety shall result from publication of or compliance with these rules and 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.