Pro 4 Rules:

Engine:
In Line 4 cylinder. No V-4's. No mid or rear engines. No aluminum heads allowed. ACCU SUMPS allowed.

Carburetor and Fuel Systems:
One 2 barrel. No fuel injection. Fuel cell required.

Transmission:
Stock, no racing transmission

Wheels:
10 inch steel wheels, no aluminum, no 4 wides

Suspension and Chasis:
Stock Spindleless, no aluminum hubs, 90-101 inch wheel base

Rearend:
No quick change allowed. No front wheel drive allowed.

Body:
70 inch body, spoiler and fin awidth 8 inches. Wedge nose allowed. No wedge bodies or sprints.

Mufflers required.
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