You have already bought it, so this info may be a bit late. If buying a new blower, I would suggest vortec. Procharger will not sell as much as a seal to an end user. You are at their mercy when something goes wrong(and things do) during race season, if you're not sponsored by them, you wait and wait and wait.
If they sold parts you could at least repair your own stuff in a timely manner.
My friend sent in his procharger for a leak. It took 6 weeks to get it back. He makes one pass and the thing eats itself up. They forgot to tighten the impeller nut and the wheel chewed up everything. They fixed it junk yard style with a used volute, and a new wheel. Got it back 8 weeks later. Sold it after swearing to never buy another one from them.