funny cars have a blower. and as with a deck spoiler it is 60 mph. under that just for show. on the challanger if they run it functional the scoops would work as a cool air intake. Over 30 mph the amount the engine would have to work to take air in will be greatly reduced. The flaps work as fine tuners for air flow changes in exelarating and drop in rpm's for a daily driver they would be more for show but heck i hope they have it i'll take it, shows off true true scoops. Unlike all the stick on and fakes out there like prevease post stated.