Depends on the tint but I know certain types (as well as laminate windhields like Audi, some minivans, etc) make even a V1 nearly blind. There was a Car&Driver article on this awhile back. (can't remember the issue but if I find it I'll let you know) Sorry but I don't have data in front of me on specific brands of tint. Your best bet is to talk to the tech department at Valentine research and/or the tint manufacturers.

Hope this helps...Lee