If I take out the stock COTTON air filter and put a RUBBER K&N air filter will it make the noise of a custom?
I have a 93 Honda Accord LX Sedan, recently got my car back from my mechanic, because I did a H22 swap. I noticed the day I got it back the black box that fits the cotton air filter wasn't in there and it was just the intake tube and it sounded great,
just install a cold air intake. no air box will reproduce the sound of it. and if you have the money for an H22 swap, you should be able to afford a $200 CAI.

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