HKS TO4Z turbine housing and Garrett??

[Black7Conv]

Hi,

Do you guys know if HKS turbine housing and Garrett\'s are the same? I have a HKS TO4Z turbo kith with a small turbine housing A/R and i think that 1.00 A/R would be a better upgrade. But, I cant find one from HKS in Greece and I\'ve told that a P trim 65 or 66mm 1.00 A/R turbine housing from Garrett would fit my HKS TO4Z kit.
Is that so?
thanks in advance,
George