The sides extend all the way up under the fenders to seal completely. This should work just like the traditional type, except it's breathing through the entirety of the large hole, instead of the snorkel - and has no leaks for hot air.

-Philip Maynard '95 Contour [71 STS | Track Whore] '97 Miata [71 ES | Boulevard Pimp] 2006 autocross results