Jdm turbo?

They are ok. Good unless you start to push them. Alot of them have ceramic wheels in them which can break apart depending on the amount of boost you run.

I have a 98 JDM toyota aristo (Lexus gs300 for North America) with a 2jz. It has a sequential twin turbo setup, spool really well but they can break apart around 20 psi. Im running 14 and they are happy. 14-15 is safe on Ct20 turbos. I know toyota and nissan have alot of ceramic ones, but im not sure about the rest. You would need bigger ones for a v8, but im not too sure about the larger ones.