40% 3M Chrystalline all the way around except the windshield, good tint is essential in AZ. I normally get my windshield done in 20% also because it helps with the heat a ton but it impacts the radar detectors so I didn't do it on this car. 3M has a demo they do a SEMA and some of their shops that uses a heat lamp and demo's different tints, Chrystalline is significantly more effective at blocking heat than typical tints (of course there are several makers of ceramic nano tints that I am sure all work).
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