Improve the smoothness and performance of your Traxxas vehicles with these CNC machined aluminum shock body and lower caps. Featuring an upper cap o-ring to provide a better seal (works especially well with the ST2267 shock caps). Lower shock cartridge area has been redesigned to better accomodate the stock Traxxas O-ring and plastic sleeve for the smoothest shock operation. This is a must have upgrade for the best suspension performance of your Traxxas buggy or Trucks.