Team Associated B6.1/B6.1D Factory Team Direct Drive Slipper Eliminator KitASC91800 This is an optional Team Associated B6. 1 B6. 1D Factory Team Direct Drive Kit. This kit eliminates the slipper and mounts the spur gear direct to the top shaft. This upgrade helps drop unnecessary rotational mass and weight. Features: Direct Drive top shaft eliminates the traditional B6. 1 slipper clutch. Weighs 30% less than the traditional B6. 1 slipper clutch. Faster acceleration from less rotating mass. More efficient drivetrain may