does this apply to all cars? I should try rerouting my fresh air intake on my car to this area...which brings me to another question. Why are most aftermarket fresh air intakes piped to the inner front fender of front portion of engine bay? If the high air pressure accumulates under the front windshield, wouldn't you want it piped to this area instead?
Yes.
All cars have a high pressure area where the windshield meets the hood. Some are greater than others.
Aero is different at highway speeds vs 100 mph and different again at 200 mph.
At highway speeds the pressure at the base of the windshield isn't too high. The faster you go the higher it gets.
Most fresh air kits draw from the front because it's convenient, easy, and fairly consistant.