oil return
its not suggested but mine is plumbed that way. I have taken it to 8200 with no problems. My turbo is mounted about cylinder head high so it has a 6" drop right out of the turbo and then a gradual slope down to the pan. Its -12 as well.
I think the thread is a 16mm but I just welded a -12 aluminum bung over the hole.
I don't have a picture of it installed but this is on the engine stand.

I clamped to the pan bolts.
I don't have a picture of it installed but this is on the engine stand.

I clamped to the pan bolts.





