truthfully easiest way to do CAI and make it sound like your talking about is to buy the one you see, if your friend's TSX has ram air or full fledge CAI then you should follow his example if you like how it sounds, however honda and toyota's sounds differ a great deal

and where you might hear his hiss alittle from inside the cab us toyota owners enjoy a nice peaceful ride and still enjoy the extra power

, though others may still hear it hiss from outside
Did my own CAI used 2 rubber connectors a cone filter and a piece of aluminum piping, pretty simple. though there are other good ways to do it

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