The one way flaps are common on a lot of late models and, as rrr mentioned, very effective.
A buddy liberated some stock firebird T/A scoops from their crusher-bound donor, and mounted them high in the fenders of his '85 three quarter ton Ram. Hanging your arm out the window verified it, they were VERY effective, with outflow temperatures pushing 100-120 degrees.
STRANGE, I`VE BEEN THINKING ABOUT THIS SAME THING. I RUN A 6 PACK SCOOP, BUT HAVE BEEN THINKING LOUVRES IN THE REAR OF THE HOOD,BETWEEN THE SCOPP AND EDGE OF THE HOOD.Hard to imagine louvres in a fiberglass hood w/o messing it up tho.
