I put a K&N induction kit on my VR6, Filter, connecter and cool air ram tube.
Made a bloody awsome induction roar, lowered the fuel consumption lots and knocked 5mph of the top end.
I've put the standard air box back on and run a quality replacement, It was made that way for a reason!
I just fitted a cold air induction tube direct from the front of the car behind the grill under the bumper
To be honest with you, Unless youve fitted a cam or fiddled with you're injection your engine aint gonna out suck the standard but cold air fed air box.