Can't wait for the wrightup.
Any water temp issues?
I put a donaldson in my GQ. Filter change is R280 for the main filter
It also has a secondary filter.
It is cheaper and bigger than any Patrol standard filter.
Changing to a bigger filter has been the biggest power and driveability improvement I have made to my Car.
Only modification to make it fit was to move the radiator overflow a bit forward.
But I know the 4.5 bonnet is quite cramped for space with the rear aircon and such.