What turbo is a 45V2?

"45V2" is not a common turbocharger designation. It's likely a specific model code or abbreviation used by a particular manufacturer or for a specific application.

To help me understand what you're looking for, please provide more context:

* Where did you encounter this term? (e.g., a car forum, an online parts listing, a repair manual)

* What make and model of vehicle is it associated with?

* Is there any other information available, such as the manufacturer or year of the turbocharger?

With more information, I can try to help you identify the specific turbocharger.