Yes, a BOV only releases air into the atmosphere, not anything harmful.Flex said:
No offense to you, but your friend doesn't really know what he is talking about. BOV's let off only compressed air, as in Nitrogen/Oxygen. BOV's effects on emmissions, I don't know, but they do absolutely no harm to the environment.
Maybe he was thinking about open air wastegates which are far from legal.
Somebody correct me if Im wrong