HOLA Amiguitos.... menos mal que estamos en chile pues.. ya que esas son reglas gringas...
ahh tambien estan prohibidas :
les dejo LINK:
http://www.arcorr.net/id9.html
Drive line: Any Traxxas aftermarket or Hopup replacement drive components may be installed. Any of the 3 Traxxas spur gears (4683, 4686, or 8690) are permitted. Any pinion gear that mounts without modifications needed may be used. Ball Differentials NOT permitted in S-2 Class
ahh mira lo mas importante:
Motor: This class is restricted to the Traxxas Titan 12T Brushed motor. sorry jeje
Saludos
Alexis Miño
TEAM MASTERTRACK