hi i need help not sure i recently took my air box out of my teg and replaced it with a K&N podfilter but i jus replaced it so the car still has the rubber intake pipe i am not sure if gained power from this or not and i noticed my car is using up more gas the thing i do not understand is that a pod filter suppose 2 make u save on fuel well thats wat mechanics say. is there anything else i need to do to make this happen or is it just a LIE ???