[Roadsters] intake/exhaust studs in R16 head

[steven boortz]

Hi everyone
I'm not very good at finding this information, so I come to you guys.  So, thank you in advance.
What size are those studs?  I believe the outside (not the side that threads into the head) is M8, but I want to make sure.  I have no idea about the other side, the side in the head.  The hole for one of mine as it goes into the head is stripped, and I need to replace it.  I'm thinking of re-tapping the hole one size bigger, if a new stud is available for that new size.
Thanks againS675MIZU (getting closer....)

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