4" Dirt Outlaws:

Chassis:JK,Parma,Champion,Trinity 4"

Motor:Super 16-D,no ball bearings

Axles:3/32 or 1/8 size

Front tires:1/2" in size at the least

Gears:48 pitch (7/29 best) 64 pitch (8/36) best

Bodies:Parma or JK 4.5" Dirt Outlaw bodies

4.5" Dirt Outlaws:

Chassis:Same as above except 4.5"

Motor:Balanced or unbalanced 16-D (may use S-16 magnets)

Axles: 1/8" in size

Gears:48 pitch (7/29 best)

Bodies:Same as above

USRA Classes

Group 10,Scale 4.5",GTP

USSCA Classes

Production C,Group 12,Cobalt 12 hand out cars