Help with turbo identification
 

I bought OEM housings that were modified to accept an unknown center section. The center section has no identification plate on it, but I was told it was a ball bearing center section.

The impeller wheel has an inducer of 51.7 and exducer of 76.2 along with 12 blades, and the turbine wheel has an inducer of 56.5 and an exducer of 51.5 along with 10 blades.

Does anyone know what type of center section this is?