The glass should have a little thing on it that says 'AS1' with an arrow. Thats the lowest it can go. But as long as youve got a legal percentage I doubt any cop would realize the strip is too low.

 

windsheild is as1 or around 5 or 6 inches
front door (car) is between 25% and 30% (not sure)
front door (truck) 20%
back doors are 20%
back window is 7% or 10%

you can find the exact numbers if you search on yahoo

 

i got 5% on the eclipse and soon on the talon .the odds of getting a ticket for it is very low.on the windshield you can tint the top 6" i think

 

I only know one person to get a ticket for tint, I have 15 on my cars and its just right for me.

 

ive got pulled over for mine, but its a silver reflective tint, showed him the reciept and the legal % i had on and he let me go