i'm doing mine too... want to match the rear windows only..

i believe it is 35... llumar comes up alot... dark from outside but lighter from the inside..

also heard good things about 3M.

not sure about the ceramic types like Huper Optic...

there are plenty of places in NY... one on every corner.. ask around.

other inputs???

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2012 X5 50i M-Sport
2014 X3 35i M-Sport