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I think the 03/04 JDM is a VF36 and on 05 they changed to VF37 iirc
VF36 and VF37 are essentially the same turbo. VF37 is a journal bearing turbo, VF36 is a roller bearing unit. VF37 is fitted to standard JDM STI's, VF36 is fitted to the Spec C. There is a variant, the VF42, which is still a twin scroll roller bearing turbo but features a larger compressor housing and re-designed compressor wheel and is only fitted to ltd ed cars, namely the S203, S204 and Spec C RA-R.