What % tint?

so when you throw 35 on top of the 80, you end up with 15% passing thru..

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If you put 35% on your windows you will only have slightly lower than that even with the factory tint. The numbers won't add together like that. I put 20% vlt (visible light transmission) with 11% reflectivity on my United Grey Fast. I usually don't like the mirror stuff, but this tint has a "gunmetal" finish that really looks good on the UG car.

Anyway, I put a light meter on my window and it came up at 19% vlt. Different tints will rate differently, though. Just because you put a 20% vlt tint on your window doesn't mean it will be exactly that number. It varies by tint manufacturer. The numbers are a good guide, but more importantly get what looks good on your car.

The cops in NY are total dicks about window tint; especially the state troopers. I used to live in TX and everyone has dark tint down there. The cops couldn't care less.

You can either tint your windows within the legal limits of your state, or you can get your car inspected with someone who doesn't care about your tint. Just ask the inspector beforehand.

If you are unsure of your state's law check out this link TintDude.

There is a plethora of information about window tint on this site.