ok so i was a little harsh before, and i apologise
yes the product would be excellent for cold air induction, however, if you front mounted it, it would also block off airflow into the radiator. how much is it out of interest? if it is polished stainless, i would say it would be rather expensive for an air filter. a much better option in my opinion would be to buy a normal K&N pod, or whichever brand you choose, and then you could get a piece of stainless made up so that you could mount the pod in front of your radiator, like my 300zx. another option would be to make an airbox like i have seen on other skylines, which has piping that takes air from the front bumper and re-directs it into the airbox. i doubt you would see any difference in power gains from either the air-box, FMIC style, or front mounted pod, air filter options. they would all give around about the same rwkw gain. wouldn't the perspex cover significantly reduce airflow when it was attached? another thing would be that the FMIC style air filter would get extremely dirty very quickly. it would be very hard to keep clean and at it's optimal efficiency, and i imagine that air filters of that size would be expensive to replace.
personally i would say just go with a pod front mounted. easy as pie to do, and extremely effective.