This is the Traxxas SportMaxx 4WD Module. This kit converts the SportMaxx to 4 wheel drive 5191x.
FEATURES: Increases climbing traction All major components assembled to make installation as easy as possible
INCLUDES: One Traxxas SportMaxx Upgrade Kit with front differentials and all driveshafts
REQUIRES: Installing on the SportMaxx
COMMENTS: This will work only on the Traxxas SportMaxx.