Traxxas - 4951X. (2) Long external splined half shafts. (2) Long internal splined half shafts. These are the "swingshaft" or "dogbone" components of the T/E-Maxx. Length (of each component): 78mm (3.07").
This product would be ideal for applications requiring high-torque transmission and long-lasting durability, particularly in engine modifications.