Yokomo Y2-500AA Aluminum ball diff kit for YD-2 series  [Y2-500AA]

That is a ball differential set you can use for all YD-2 show automobiles.
The left and right differential housings are made of aluminum, leading to a lightweight finish. While benefiting from the high traction characteristic of a ball differential, it has many benefits, like improved throttle reaction because of its light-weight and enhanced maneuverability by reducing the gyroscopic effect.
In order to minmise wear in the aluminum components, a resin protector is connected to the dogbone tip regarding the universal shaft, optimizing approval and additional increasing response.