I guess you made a very valid point about differentials I did not know, thanks.
While looking up dual ball bearing I came across
this company that specializes in manufactures turbochargers for the WRX, and now STi. An ideal one would probably be the
SR55, but they seem to be about a smidge cheaper than the Garret equivalent.
Btw, there is also
this supposedly specially engineered T3, not to mention
Turbonetics. I am just wondering how this the custome T3 and Turbonetics turbochargers may compare to the others including the ones I mentioned before? However, there are probably better deals out there if you look hard enough.