i did a lot of research on this and 90% of sites i found using the part number came back with being garrett..only one showed it as borg warner...
Applicability of a turbocharger 313095. Selling turbos KKK, Schwitzer, Garrett. Re-manufactured turbochargers.
Borgwarner T04b11 Turbocharger Part Number 313095 - 313095 - T04b11 - Borgwarner T04 - Borgwarner

however can you shared_pm me some pricing on turbos that would be decent for 300-500whp on a 2jzge..and possibly a price on the t4 turbine