You’ve seen side vents before — we all have. They’re the little inlets on the side of a car, usually between the front fender and front door. In some applications, like the BMW M3, they actually serve a purpose; most allow hot air in the engine bay to escape outside, while others are just for show. We couldn’t believe how many we saw on both concept and production cars at the Detroit auto show, almost all of which are just for show. Keep reading to see how many we found, then try to guess the car they belong to. For the answer, hover your mouse above the picture. That’s the Lincoln MKR Concept above.