This is a bearing kit by Avid RC for the Xray XB2C '19 and XT2C '19. The XB2C '19 and XT2C '19 have a gear diff and a laydown 3 gear transmission where the Dirt Edition has a ball differential and stand-up 3 gear transmission (4 gear stand-up case is optional).
XT2C '19
XB2C '19