what is this?

Tony Fields said
Mine suck the hot air from the engine compartment as I don't have a rear hood seal. My fiberglass hood raises up a tad in the rear letting the extremely hot
air go right into the vents. I can bake a couple of potatoes in those vents in
about 10 minutes.:D

Ive heard stories of guys who put turkeys or fish from a fishing trip in their engine bay while driving home/to relatives..... by the time they're there.... its all toasty and slow baked. True story.