Foam vs cotton air filter what

What do you guys recomend foam(ramair) or cotton(k&n) air filter whit some proper cold air intake for sound and few extra hp gains
 
You won't get any more sound with either of those aftermarket panel filters. If it were me, i'd fit a V6 box.
 
I have the Ram Air panel filter. Didn't really notice much difference between it and the OEM one it replaced.
If you want more sound definitely V6 box or KTec range though I'd personally go with V6 myself.
 

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