i wouldn't go for an induction kit either. i've got a digifant like dave and have taken out the trumpet thing as well then used a k&n.
then the best thing to do is take the whole filter box out, underneath it you should see a sort of circle of metal that is tacked in place by three small welds, if there is a cylinder there instead you have a charcoal filter. knock this bit of metal out and plumb in some large ducting from this hole to the front bumper as a cold air feed. next chop a big hole in the bottom of your air box to match up with the ducting. so now you have a neat and tidy air box with a decent filter, with a factory looking cold air feed.
the thing about using induction kits is although they look good and sound quite nice (although my panel filter in modded air box is louder than when i had an induction kit) is that the suck in hot air from the engine. as we all know cold air is denser and your engine prefers it so by shielding the filter in the original air box you keep it away from all the nasty heat.
