This is Traxxas Rustler 4X4 Extreme Heavy Duty Differential Output Yoke. These are the replacement "extreme heavy duty" driveshafts that can be used in the front or rear, in the left or right position. Package includes two assembled external-splined half shaft differential output yokes.
For: Traxxas Slash Stampede Hoss Rustler 4X4
Traxxas Extreme Heavy Duty Differential Output Yoke (2 pcs)