PA has a limit for tint on vehicles, the fronts are restricted to an extremely low number, the windshield is not allowed to be tinted at all. I've seen cops here use a ticket on the back side of the window to test. If they can't read the ticket they give you a razor blade and tell you to go to town or you're getting a nice ticket in the ballpark of $180. For that reason, I don't bother with tint at all. I stripped the tint from my CRX when I purchased it and never tinted my Olds or my MB. The way I see it, the less I have to deal with the authorities the better.