Nissan Standard 4P2 Turbine?

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Hi guys.. i just need some info on this. I bought this turbinea week back, haven't installed it in my car. Currently i m having an RB20DET in my engine bay.

What i know is the turbine with the number:
16V = standard RB20DET turbine from R32 GTST
45V1 45V2 45V3 45V4 = standard RB25DET turbine from R33 and R34

but the one that i bought was... written there 4P2... it is as large as the 45V3 and the owner claim that it came from an R34 RB25DET...

can u guys help me to clarify about this?

thanx a lot...

 

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check these pics...