I think there is a serious point to make here:
XS Power are Chinese copy turbochargers. Do not, under ANY CIRCUMSTANCE BUY ONE.
These turbochargers are designed for diesel engines, they are then copied ( using poor quality materials and internal clearances) and sold as performance gasoline units. Do not buy one.
When I worked for Garrett I saw too may people spend a lot of money only to end up with damaged / ruined engines as a result.
Turbocharging is not cheap. If you cut corners with ebay units, you will get burned.
Im not preaching only sharing some peoples painful experiences.