Help identifying Nissan turbo parts

[Reptoid Overlords]

Having spent zero time around turbo Z's, EFI or blow through, I'd like to ask the community to help me identify this Nissan turbo I was given by someone who knows even less about it than me. They told me it was for a Mazda Miata. I didn't mention to them that it says Nissan on it. Maybe someone had it on a Miata at some point?

 

Anyway it has a Hitachi crank sensor that if you do a search seems to come up with a cam position sensor for the RB motors. Also an oil cooler.

 

I appreciate any info and as always, your time and input.

[Zed Head]

Could you add some poorer pictures from farther away?   Throw some more dirt and grime on also.  Ha ha ha...