This is the VS Racing cast wheel 7875 T4 turbine housing. See specs below and drop-down menu for turbine housing options. Compressor Wheel: 78x102 Turbine Wheel: 82x75 4" V-Band Downpipe Flange on the 1.25AR turbine housing 3" V-Band Downpipe Flange on the .96AR turbine housing Compressor Outlet: 3" Slip Fit Oil drain flange included