turboman

Ok, here's whats up... I acquired a holset turbocharger and I'm trying to find out as much as I can about it. This thing has two p/n ...one is 3519092, which I found to be to a H2C holset turbo. The other is 3525199, which is a holset turbo, but not sure what model. The big thing here is that I don't deal to much with these turbos and all the info I've been able to get about the H2C is that it can push about 700hp....but I do deal with turbonetics thumper turbos and this thing is the same size as the t101 super thumper which makes 1800hp to 2000hp on a single turbo. And on top of it, the H2C p/n is on a tag that doesn't look like a holset tag...more like the garret tags and the other p/n is cast into the bearing housing. Any ideas or info??