Motor: ProSlot 16d or S16d, Parma 16d or S16d, and older style 16d motors with approval.
(Chinese arm motors only)
Chassis: 4.5” Flexi Steel chassis. Aluminum pan allowed.
Gear/axle: May run 1/8 or 3/32 axle and 48 pitch or 64 pitch gears. Gears may be any ratio. Plastic spur gears only.
Tires: Must run front tire with .500 min diameter and .375 min width. May run any available rear tire. Foam tires only.
Chassis must clear .047 tech gauge.
Body: 4.5” Midsize Grand National bodies from the 50’s,60’s,70’s. American manufactured cars only.
Cars without a rear spoiler may add a ¼” spoiler on rear.
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