Ive jus ordered a K&N FilterCharger® Replacement Air Filter for my car and i need to change it bt im woundering how to get into the box that's holding my airfilter. its an 2007 1.4 formula sport. der is screw's on the underside of the box bt ders has gotta be an easier way, do you to the air box out first den unscrew the screw's to take it out and replace it? if so how?. can any1 help??