Inlet Housing is a "3", Exhaust Housing is a "6" Inlet AR should be .63
This is off the series 2 R32 so has a Different angled cut on the compressor wheel and this combination is supposed to be the better off the 5 nissan variants. Having the larger inlet and smaller exhaust means it not only spools up sooner but makes more HP. (Apparently with Nissan Turbos the Bigger the Number the Bigger the A/R)