Bendix Air Governors operate in conjection with the air compressor unloading mechanism and maintain proper reservoir air pressure between a predermined maximum and minimum air pressure. 

The D2 air governors listed below are all genuine Bendix parts.

Home Brakes Bendix Air Governors - Bendix

Air Governors - Bendix Bendix Reman D2 Governor 275491RX Bendix OR275491X Governor, Remanufactured Bendix D2 Governor Reman 284358RX $21.45 $16.30 $23.83