ARB Airlocker 24 Spl Banjo P38A Rover S/NAir locker locking differentials allow you to tackle the toughest terrain. The worlds premier traction aid, ARB air lockers keep you moving in all conditions. A complete air locker kit: replacement differential, activation switch, solenoid valve, air line and bulkhead fittings. This Part Fits: Year Make Model Submodel 2003 2004 Land Rover Discovery HSE 2003 2004 Land Rover Discovery S 2003 2004 Land Rover Discovery SE 2002 Land Rover Discovery Series