Pic 1 - Remove the original regulator with 2 screws, first remove the two hose that is connected to the regulator one with the clip and the other one is the vacuum hose.
Anyone can give opinion on 3 Garrett turbo series, Garrett GT 28R, GT28RS aka Disco Potato and Garrett GT30R. Anyone have real life advise on those and how much those turbo cost in the market?