I did 3M Crystalline 90 on the windshield and love the radiant heat reduction. You can't see the difference, no darker and the HUD works the same.
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2014 M6 Gran Coupe-Alpine White/Blk
2015 740i Sapphire Blk/Blk
2018 Tahoe RST 6.2
2019 Porsche 911 Turbo 991.2
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