ARB 4X4 Accessories Izuzu IFS Air Locking Differential, Rear 17 Spline RD203 For Use With 17 Spline Axles;For Use With All Gears;Air Activated Selectable Locker; Converts From Open Differential To fully Locked Or Spool; Simple Push Button Operation; Requires Air Compressor Sold Separately ARB 4x4 Accessories ARB Izuzu IFS 17 Spline Air Locking Differential - RD203 RD203 Differentials