Engine
1. Any engine allowed with single carburetor.
2. Total or partial dry sump systems allowed, with a 100lbs penalty. External oil filter and oil cooler allowed.
3. Cooling system may be modified; glycol antifreeze shall not be used.
4. Any American make engine may be used as long as rear of engine (bell housing flange) is mounted at least 72” forward from the centerline of rear axle. Engine offset must be kept within 2” of centerline of front cross member. Engine height minimum will be 11’ from ground to front of center of crankshaft.

Weight
1. Maximum allowable left side weight will be 58 percent of the total car weight.
2. Minimum 2,500 pounds.
3. No weight burn-off permitted.

Transmission
1. OEM production type transmission shall be allowed; 3 speed, 4 speed, and automatic. No 5 speed transmissions or “in-out” boxes. All units must be clutch operated with clutch inside of bell housing (quick change transmissions optional). Bert, Brinn, Falcon type transmissions are optional. In case of Bert, Brinn, Falcon type transmission, it is understood that the clutch is inside the transmission housing.
2. Any manual or automatic transmission. Must have at least 2 forward gears and reverse in working order.

Clutch
1. Any Clutch assembly allowed min. of 5½".

Rear End
1. Floaters and quick change are allowed.
2. No Wide Five, no tube type axles, and no aluminum axle tubes.
3. Magnetic steel drive shafts ONLY. Must be painted white.

Brakes, Wheels, and Tires
1. Must run one brake per wheel. Single piston caliper.
2. Maximum 8” wide steel racing wheel allowed.
3. Hoosier F-75.

Frame
1. Stock frame-36” front of centerline of rear end, forward will be standard. Anything else will be subject to a weight penalty, depending on the advantage you might have with a different type frame.
2. No widening or narrowing of frame.
3. Fuel cell can not be any lower than 4”.

Suspension
1. Tubular upper control arms. Bottom will be stock for frame and spindles used.
2. No rack and pinion steering allowed. Stock steering only.
3. Front springs 4”minimum in diameter. Rear springs 2.5” minimum in diameter.
4. Only coil springs or multi-leaf allowed on rear.
5. Only one shock per wheel.
6. Must run steel bodied shock non adjustable. Aluminum shocks are permitted with an additional 50 lbs. added to car.

Body Specifications
1. Spoilers allowed on rear at a maximum of 8” height and cannot extend past rear quarter panel. No side foils behind spoiler. Total material is not to exceed 8”.
(See hard copy of rules for clearer diagrams)
Measurement Maximum Minimum Notes
A 110” 105"
B 38” 28”
C 45” 34”
D 120” 106”
E 72” N/A Door must not pass back of block.
F 27” 22”
G 52” 42” Roof rake 1”x 24” measured by using
24” level with 1” block attached to end.
I 66” 63”
J 50” 44”
K 56” 41”
L N/A N/A Left-rear tire must be partially outside of
body & visible from front, rear, and top.
M N/A N/A Driver compartment must be totally
sealed from engine & racetrack.
N N/A 8” Rear panel should be attached to deck &
extend to bumper & quarter panels.
O 20” 18” From the ground to the center of the
bumper.
X 2” N/A
Y N/A 4” Minimum interior slope, front to rear.

Windshield
1. ½ Windshield required on driver’s side. (Full windshield is recommended)
2. Windshield must cover complete opening on driver’s side.

Interior
1. Must have minimum 2-pound fire extinguisher with a gauge and a quick release mounted securely in the car within reach of the driver while belted in car.
2. Must have quick release type window net. Window net must release from top. One mirror is allowed inside car.
Must abide by all general rules!!

Backside of rear spoiler must be left blank for class sponsor decal!