I know what the problem is, but if I tell the truth here my post will be deleted. That has happened 3 times now.
I'll just keep posting this when I see these posts and it's frequently.
The short version is DO NOT buy aftermarket hybrid turbos... unless you like replacing them frequently and supporting these folks, it is hit and miss with them.
The hole they drill to fit the larger Holset compressor wheel is rarely perfectly centered and dynamically balancing the individual parts at only 2000rpm like they do, does not cut it.
After dynamically balancing the individual parts the completed assembly must be balanced at 100,000~200,000 rpm on a very expensive VSR balancing machine if it is going to last as long as a factory KKK turbo, and your's is not.
I know, I've been through 2 of them.
http://www.turbotechnics.com/docs/turbo/balanceinfo.htm
http://www.youtube.com/watch?v=-nbr0vepBkA
3 VSR turbo balancing machines exist in the USA.
///watching. . . . .