Factory Stock

2012 FACTORY STOCK RULES

Car: Any American made 2-wheel drive, rear wheel drive, front engine car. Min 101 wheelbase. Wheel base must be the same as car being run. No independent rear suspension. No 4-wheel drives.

Engine: Flat top pistons only, No aftermarket heads or blocks allowed.  Vortech heads ok. No bowtie heads. No angle plug heads. No roller cams. Roller rockers are allowed. No stud girdles allowed. 360 cu inch or less may a aluminum dual plane non-air-gap intake with a 1-inch spacer and a vac secondary 4 brl carb. No Performer rpm intakes allowed. 361 and larger may run a dual plane aluminum intake with a 4-brl to 2-brl adapter with an unmodified 4412 Holley carb. Carb must meet go-no-go gauge. Headers are allowed . No 180 degree headers. No crossover headers. Stock type HEI ignition only. No MSD or magnetos. Engine must be in stock location. May use solid mounts.

Trans & clutch: OEM trans only. Min 10 ½ in clutch assembly. No Aluminum flywheels. Automatics must have min 10 ½ in working converter. No dummy converters. All gears must work in forward and reverse. Must have inspection hole in bell housing. Explosion proof bell housing is recommended.

Driveshaft: Steel OEM driveshaft only, must have safety loop within 12 inch of front u-joint. Must be painted white and have your car # on it.

Rearend: 9” floater style ok. 4-wheel disc ok. No quick change devices allowed.

Body: Must be OEM stock appearing body. Plastic nose ok. 6" spoiler allowed max 18" side braces. Must have 3 windshield bars in front of the driver.

Firewall & Floor pan: Must have original firewall from the bottom of the windshield to the floor pan and back to the center of the rear spring cups. Must be in stock location. Must be frame rail to frame rail. All holes must be filled.

Roll cage: 6-point cage with at least 3 drivers side door bars and x-brace to rear of car. Must be welded to frame in a safe manner. Front and rear hoops are allowed. Min tubing thickness is .095. Unibody cars must be tied together at sub frames.

Brakes: May use dual master cylinders, but may not use the bias adjuster within the drivers reach. All 4 brakes must work upon inspection. RF shut offs ok. All calipers must be oem.

Suspension: OEM only. All mount and parts must remain stock OEM location. Factory length trailing arms on both sides. No shortening allowed. Mounts on the bottom of the housing must not be lower than 3 ½" below the tube and the top must not be more than 3" above the housing. Leaf spring in stock mounts and in stock location. Lowering blocks and spring spacers are allowed. No more than 2" of spacer on any 1 spring . No adjustable spacers or weight jacks allowed. Rear springs must be the same length on both sides. Upper A-arms on the front maybe replaced with aftermarket tubular type with cross shaft only. Steel type uppers only. IMCA stamped.

Shocks: Stock mount non-adjustable shocks only. Steel shocks only. No take apart or rebuildable shocks allowed. No bearing end shocks, one shock per wheel.

Steering: Quick release style ok. Steering quickners ok. Aftermarket power steering pumps allowed.

Fuel: Gas only, no alcohol. Fuel cells mandatory. No stock type tanks allowed. No electric pumps.

Tires & wheels: 10” steel wheels max. Asphalt takeoffs 11” max. 8” steel wheels with 8” tires. Takeoffs or kk704. No mixing of tires, sipping and grooving allowed. Beadlocks on the right side ok. All tires must durometer 50 min after race.   

Weight: 3,200 lbs after race with driver. All weight must be mounted with 2 ½" bolts and painted white with the car # on it.

Safety: Min 5-point harness. Must not be more than 2 years old. Aluminum racing seat only. Must have fire extinguisher. Must have window net or arm restraints. Must have kill switch marked clearly on/off in plain sight. Mandatory fire suit, gloves, shoes etc. at all times .

General: The rules are subject to change at any time for the improvement of the sport. Thanks MAS