Originally Posted by phunk

None of the turbo system builders make their own turbos. The turbocharger units are produced by very few manufacturers, most of which are OEM suppliers with extremely high quality control.

Alternately, there are some knock-off turbos out there on eBay and what not. You wouldn't want those. There are also lots of turbocharger mix-masters that mix and match components to compile their own custom brew turbos. Some of them I wouldn't go near, and some of them I would prefer over the OEM version.

This FI kit appears to use Garret turbochargers, with upgraded Tial turbine houses. This is pretty much the top tier for turbochargers.