look on the compressor cover backing plate and see if there are any numbers engraved...also you can take off the Inlet tube and see if there is a sticker with the model number on it as well. If not the the only real way is to take measurements.
If you don't find it in those spots, remove the outlet hose on the compressor cover. Look around where the hose covers. Lots of turbos will have the identifier there. That spot is typically always protected from scuffing, dirt and such.
If you don't find it in those spots, remove the outlet hose on the compressor cover. Look around where the hose covers. Lots of turbos will have the identifier there. That spot is typically always protected from scuffing, dirt and such.