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  • Home
  • Rulebook
    • 4" Nascar Rules
    • Nascar Hard Body 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

ASPHALT modified rules

Asphalt Modified Rules

Chassis - 

JK2600 Brass Modified Chassis, PARMA FCR 4" Chassis Cut Down, Reality Modified Chassis, or R-GEO Modified Chassis. (All Modified Chassis must be approved by Race Director)

May solder, glue or use motor screws to mount motor to chassis.

May solder or glue bushings to chassis.

Must Have .047 clearance at all points of the chassis including the spur gear.

Any Guide Flag may be used.


Width - 

Car Must Not exceed 83 mm (3.268") at any point on the car.


Bars - 

1/16" brass rod or tubing only.

Max Width is 83 mm (3.268") Min width 3.1"

Must have full side bars.

Rear Bumper 1/8"-3/16" square brass channel or min 5/16" rectangular.


Motor -

Approved JK Hawk 25 Only. Motor Must remain box stock.

Any lead wire may be used.


Axle - 

Must be 1/8" solid.

Oilite bushings only.


Gear -

48 pitch 9 tooth pinion straight or angled. Any Crown.


Tires -

May coat front tires (clear nail polish).

Pro-Track Daytona Stockers only.

Front .800 x .800 min 

Rear .800 x .825 min - .950 max

1/8" offset max front and rear.

Independent fronts allowed.


Body - 

Reality Raceway or NY Modified only.


Weight - 

Min Weight is 145 grams.

Must be inside the chassis.

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