Swapping wouldnt be a good idea - it will just allow dirt to get into your engine, but theres no harm in putting trumpets inside the air filters though - in theory it will provide some benefit - in practice I'm not sure you will see much difference unless you have a proper fire breathing dragon of an engine
Theres masses of info on line and the general consensus is minimal if any benifit on stockers and fire breathers alike without a **** load of tuning of the "trumpets" shape size height blah blah blah they do look nice though.....
if you do then you'll need the socks over them as said keep all that airbourne **** out of the engine.....