Perrin Rear Window Vents PAIRPerfect for keeping your cabin interior cool during track days or accenting your car's exterior. Because race car PERRIN rear window vents Allow you to comply with track rules to keep your windows securely rolled up while venting hot cabin air without using your AC. Installs in seconds PERRIN rear window vents are simple to install and remove in seconds. The in channel design allows you to slip them in and out easily while remaining completely secure.