Do I need individual compressors for each ARB Air Locker installed in my vehicle? April 07, 2022 17:58 Updated No, each of our air compressors has provisions to activate 2 (two) Air Lockers i.e., front and rear. Related articles Why do I have to have my engine running when inflating tires with an ARB Air Compressor? Can I replace my factory/OEM locking differential with an ARB Air Locker? At what speed can I engage my ARB Air Lockers?