Traxxas Hoss/Rustler/Slash 4x4 Extreme Heavy Duty Differential Output Yoke Assembly. These differential output yokes are intended for the Traxxas Hoss 4x4, Rustler 4x4 or Slash 4x4 when equipped with the optional Traxxas Heavy Duty Upgrade Kit (9080). Package includes two differential output yoke assemblies and two driveshaft pins.