Lol they arent enclosed the top of the box IS the intake and IMO they look good but are crap as they suck nothing but gutloads of hot air out of the engine bay. My car had 1 and when i upgraded the turbo i ditched it quick smart. If you own a GTR thought the stock air box isnt a restriction till around 400kw??? Id gladly pay $330 to be legit and also sucking cold air