Plug for stock oil feed

[Halon]

Chris which plug is that? I didn't know they made any plugs for these. The only thing I was wondering was if the N/A 1g's came with a plug, or is it a totally different casting without that hole there?

Also I went to Napa and gotta M10 x 1.25. Then I brought it home and it wouldn't screw in. Then later on I found my Banjo bolt, and compared them and the threads were different. So I brought it in and found out it's an M10 x 1.0. I wonder it the previous owner put in the wrong thread banjo bolt at some point, and kinda rethreaded the head in doing so? Either way the head is threaded for 1.0 now, so I need a 1.0 bolt.

I found a grease fitting in the 1.0 thread, so I put that in there as a temp fix. It works kinda, but it leaks a tad out the little ball on the tip.