Here are a couple of links to real shutters. They are made to be mounted on radiators, but one could mount them into a custom grill.
I would use 12v linear actuators if I was installing these on a car or other small vehicle.
They need to be lubed every 20k miles. Not really practical for heavy duty trucks as a active grill. So you won't find one of these in our next-generation Class 8 rig. But we will have our own active grill.
http://delpprintingandmailing.com/bw...FDs/sb1006.pdf
http://delpprintingandmailing.com/bw...s/Shutters.pdf