Congradulations on your CX3.... I'm sure you will love it. I had 18% carbon tint installed on all windows except the windshield. The tint percentage identifies the amount of light the tint will allow to pass through the window. Therefore the lower the number, the darker the tint. In my opinion, I would tint all windows the same. Enjoy your ride.
Ceramic GT, AWD, 18% Window Tint, Matte Black Enkei Raijin 18x8 with Black Spline Drive Lugs, 225/45R18 Michelin AS3, All Weather Floor/Cargo Mat, Splash Guards, De-Badged Tailgate, Black Plastic-Dip Accents