G'day Aaron,
I've just recently compiled the filter part numbers myself for my GS for the two filter companies of which I have a local supply. Donaldson I get from a Hitachi heavy machinery place and Fleetguard from Truckline.
Donaldson
- Donaldson P550422 (Oil)
- Donaldson P900433 (Air, Main)
- Donaldson P900434 (Air, Inner)
- Donaldson P550588 (Fuel)
Fleetguard (Truckline)
- Fleetguard LF3642 (Oil)
- Fleetguard AF4059K (Air, Main)
- Fleetguard AF988 (Air, Inner)
- Fleetguard FF5030 (Fuel)
It should be easy enough to cross reference other brands from these numbers.