Most cold air intakes you'll hear "noise" on the web that they simply take VERY HOT air from inside the engine compartment using a huge cone shaped "open" filter , ....
I'm looking into a true externally sourced intake / scoop ? Like through the hood , like the Mopar Mucsle cars you push a button and this oversixze scoop slowly opens like a Great White Shark -Jaws
Look at those WRX hoods intakes , that application was successful , right ?