This is the optional Factory Team SC10 4x4 Upgrade Kit from Team Associated.
FEATURES
Updates the SC10 4x4 short-course truck to the latest competition
specs
Allows the use of a saddle-pack battery for
better weight distribution
Carbon-fiber chassis brace rod for more consistent chassis flex and
better handling and traction
VTS4 variable torque multi-plate slipper clutch with four drive
surfaces provides increased torque capacity