Gear, differential output (Revo center diff, rear with rear brake kit (5417)) This shaft is longer and allows the use of the 5417 rear brake kit. Use 5416 for non-brake applications.

Product information "Gear, differential output (Revo center diff, rear with rear brake kit (5417)) This shaft is longer and allows the use of the 5417 rear brake kit. Use 5416 for non-brake applications."