Curtas

I was taking measurements for my downpipe today and was looking at the head. In the middle on a little "rail" above the exhaust manifold there is a hex bolt/plug. At the end of the head(side with the ignition coils), there is the internal hex plug (which many have had a bitch of a time getting out), and right behind that, there is another hex bolt/plug.

My question is: are all of these to high-pressure oil galleys? Could one tap the oil for a turbo, or put a sending unit for a pressure gauge in any of these? I was planning on using the internal hex plug, but with the difficulty of getting it out, I was also looking for other options.

Thanks,
ac

Random

All I have seen have remove the hex plug located at the forwardmost, right hand side.

Reference photo

Curtas

Yeah, that's where I have seen most people install it. Although I thought I saw one person (2Uniq?) with the oil for turbo coming from there, and the oil pressure sender coming from a different hole (in the head, not the switch location down below).

ac