Howdy,
Anybody had any experience with the CCT Turbo brand....model is GTA1752V and found here

https://speedupautoparts.com.au/gta1752v-cct-turbo-charger-for-volkswagen-transporter-t5-2-5d-bpc-070145701n.html

They are only $649 but I can find no bad reviews...but no reviews...