Turbo cartridges. Does someone have any experience with it?

Hi folks!

I'd like to know, maybe someone has some experience with OEM turbo cartridges produced in China?

My compressor and intake became covered by oil a lot, so I think big charges are knocking into my hood.

For example I found these for my RD28T:
https://ru.aliexpress.com/item/TB252...ceBeautifyAB=0
https://ru.aliexpress.com/item/Repla...ceBeautifyAB=0
https://ru.aliexpress.com/item/45202...ceBeautifyAB=0

Looks easy enough for DIY work

https://www.youtube.com/watch?v=Fo_7AeO9g4I