Can't believe there isn't a "which turbo?" thread as a sticky. As I'm always asked this by builders and as it always crops up here I will give my 2p's worth! .
First of all, this is just a basic guide for VR/R specific "what turbo's?", specific info on turbo speccing I would suggest reading things like this;
https://turbobygarrett.com/turbobygarrett/basic
and going through all their guides plus many more threads on the net. This is probably for noobs then who don't want to learn that!
I would estimate that around 90% of owners that come to me are usually looking for around