oh I read it, and I gotta say, the guy telling you to put it on backwards is most right, otherwise a TMIC or a ram air is good. Cutting a hole and calling functional will only get your engine wet in rain, take one of the three advices and you'll find that your visual upgrade makes you go faster.
A) reverse scoop
B) Top mounted intercooler [very controversial, adds higher center of gravity but uses less piping for turbo lag and less weight also puts the weight closer to the middle of the car for an improvement on MAZDA's already great weight distribution. Problems include, being careful when washing your car with a hose, engine will heat intercooler when idle (no redlight is long enough to heat sink away your power), and higher center of gravity, but it's what my FC has and i love it]
C) Ram air-will add power but keep clear of water, rain is ok. (as mentioned earlier it won't do much with a turbo already forcing air in. TMIC is your best bet if youy have th emoney, if not, reverse scoop, and if you reverse scoop it, bodo or patch it to make it more aerodynamic and stylish, also you would be the only one with it.