So, Turbonetics just basically took what HKS had been doing for a couple years and applied it to their compressor housings. Hopefully they'll be a little more affordable than the HKS units [read: under 2 mortgage payments].
Garrett's been playing around with the shrouded compressor housings for awhile. I have one on my GT30R, but I have yet to swap out the housing to a more vanllia-flavored Precision housing. HKS offers a "air horn" type deal that screws into the machine-tapped housing of the GT30R. Wish we had a dyno!!!