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    • Home
    • Rulebook
      • 4" Nascar Rules
      • Nascar Hard Body Rules
      • Porsche Rules
      • Figure Eight Rules
      • Crate Late Model Rules
      • Bracket Drag Racing
      • H&R Racing Truck Rules
      • JK Boxstock Rules
      • Womp Rules
      • 4.5" Trucks Rules
      • 4.5" Scale Nascar
      • 4.5" Grand National
      • 4" Dirt Late Models
      • Pro Bar Sprint Rules
      • Womp Dirt Late Models
      • Asphalt Modified Rules
    • Class List
    • WOMP NATS
  • Home
  • Rulebook
    • 4" Nascar Rules
    • Nascar Hard Body Rules
    • Porsche Rules
    • Figure Eight Rules
    • Crate Late Model Rules
    • Bracket Drag Racing
    • H&R Racing Truck Rules
    • JK Boxstock Rules
    • Womp Rules
    • 4.5" Trucks Rules
    • 4.5" Scale Nascar
    • 4.5" Grand National
    • 4" Dirt Late Models
    • Pro Bar Sprint Rules
    • Womp Dirt Late Models
    • Asphalt Modified Rules
  • Class List
  • WOMP NATS

4.5" Grand National rules

 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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  • 4" Nascar Rules
  • H&R Racing Truck Rules
  • JK Boxstock Rules
  • Womp Rules
  • Class List

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