i’ve seen a ton of threads trying to figure this out, but no e have been conclusive. i ended up with this huge turbo along with a mitsubishi td04h. here’s everything that’s stamped on it.

comp housing: holset, 9L01

turbine housing: usa, holset, 3594976, 1802, 9_ -00-


comp fan is something like 57mm and the housing is 8” ish