it comes with the pte housing which is the way to go....supposed to spool better altho some say slightly slower initially....but, it definitely comes on better at top end.
I wish to heck that people would learn that the stock converter is fine with these small turbos if the car is tuned right. Geez, Louise, Look at Grumpy running a stock converter in his daughter's car with a PTE51 which is a definite step up in size and running lower 11s this week.
Oh, hell, I give up. Buy a GT3255 and go slower on the top end but you can damn sure impress all the kids down at the Sonic with your burnouts.
Good luck on find a Garrett housing from a reputable builder.