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So that is the filter relocator part of the setup yeah ? Not the part that bolts to the block ?

Why would that bit get removed ?

Can you remove the one from the block and see if it will screw in, at least that will tell you if its 3/4 unf or not

Its M18 but not sure on the thread pitch sorry

Go to a wrecker and find an old VL or r31 with an rb30 in it and Rob the fitting out of it. That's what I did

Wow, so it is the same as the factory RB30 fitting that holds the oil filter, interesting :)

I'm pretty sure it was M18 because I had to run a dye over mine. there is a definate step down in the VL filter stud from the filter end to the end that screws into the block and seen as 3/4 is pretty much 19mm I'm fairly certain its 18mm.

Just go and grab one of them, must be close to a wrecker that has some old VL's? There are heaps of them where I am, and I'm not in a huge city.

OR am I misunderstanding how the GREX plate works? mine had a female 3/4 thread to go onto the filter stud to hold the sandwich plate on then had the male 3/4 end sticking out the other side for the filter. The fitting circled looks a bit different so maybe I'm way off in my way of thinking? Not sure

Anyway, I couldnt find the part number for the stud when I was sourcing mine, but if you could find this then a quick trip to Holden/Nissan would net you a brand new one. Maybe go ask Holden and they can look it up. they generally require less information on the vehicle than NIssan. But again that all depends on if I'm thinking on the right lines or not lol

The thread in the greddy plate is bigger than 3/4x16unf...

The grex plate is the relocator plate, it sits at the top of your engine. It was a male screw in adapter stud (unsure what size) the other end of the stud houses the oil filter (3/4x16unf).

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