from a distance it looks suspect to me. Any pics of comp housing side.

ex housing looks like its too new the way the rust has built up, to be genuine garrett i think its an ebay type one from china, unless its been blasted or wrapped?

the comp housing looks really shiny cheap alloy? again it could be cleaned etc.
and why a non watercooled housing. Unless its a really old core which tend to be so far gone noone would rebuild it.

all guessing from pics of course so nothing is for sure.