...or the guys that can't afford it like me!
Ok a cheap way to get a little more performance out of your car, and a nicer sound.
Use a Dremel Tool cut out the bottom of the airbox. Make sure that the Air Filter
is still being used! The fans are right below so you get a nice deep sound and a little more boost! Not a 25 HP improvement or anything, but at least a Mental 5 HP!