One never can't tell really...but I would guess that they are from one of the production classes, meaning that engine wise they are quite stock. They probably have a full catless system(due to change for next year...one cat needed). Production classes however doesn't mean the car off the showroom. Various suspension mods are allowed and they are mated to a 14 point rollcage, stiffening everything up.
I don't know what the specs are, but I do know that I hate you for posting that pic because now I HAVE to buy the Prodrive Headlights, the Fastline mudflaps, fog light covers AND spend money to have my rims painted gold.
the actaul Impreza WRC have air vents on top of the two projector lens but I think the ones shown are the replicas, so basically they have them for looks. Also, they might have HIDs in them for night driving. I have some HIDs in my reflector lens but the light spreads around and when I have extra money to toss around I'll be investing in a set of projectors.