External Speed sensor kit - used for VT-VZ Commodores when running a Powerglide or similar gearbox but doesn't have the ability to run a speed sensor in the case (Reid case is an example). This setup allows you to run the sensor off the factory IRS diff and plugs into the factory harness. Kit comes with Sensor, Bracket and 2.75m wiring to allow plug-in to factory harness. Note:- Bracket is designed for Factory IRS Setups with ABS tone ring only