Nissan SR20 exhaust manifold stud size?

[Mowog01]

Sorry, bit of a dull and very specific question, but does anyone happen to know what size the manifold studs are on my 1996 Primera eGT?

I have a lovely new manifold to fit, but I want to get new studs and nuts as backup before I start.

I think they may be M8. but I can't seem to find out how long they are.

Thanks in advance.