i can 2nd that.. they do get real dirty.. if u get one.. buy urself some filter cleaner and oil to go with and be prepared to give it a clean ever few thousand miles.. doesnt take much just will need doing. Ive got a piperx fitted to mine, when i got the car i dont recon the guy before me had every cleaned it.. it was horrible... dont have any idea how the car was suppose to get any air.
Hope this helps
Knobby!
Ps.. they do sound good! but then again so does an air box with loads of holes drilled in it!!!