The turbo has an M12x1.25 thread, which seems fairly generic, and is nice and easy to get AN adaptors for.
The supply from the oil filter housing has me a little stumped however. Ive circled the stock supply line in red in the picture below. Ideally I'd like to do away with the adaptor that's in place, and replace it with a -4AN adaptor, to match the turbo side. Can anyone tell me what the thread in the oil filter housing is here? (not the flare adaptor screwed in). It's tapered, if that helps.

I really need to study up on threads other than nice simple metric ones!