Registered: 17th Oct 00
User status: Offline
They're fine if you want an OE replacement lifetime filter.
They filter better than paper, can go longer between services (cleaning intervals) than paper (which you just replace) or cotton-gauze filters (which are a pain to clean).
They're easier to clean than cotton-gauze: you can just clean them under the tap (following the correct cleaning instructions).
Lifetime warranty against manufacturers defects - the last filter you'll need to buy!
As an OE filter, you're not going to get much in the way of power, but with a modified airbox you might be able to get a little more induction noise.
Enlarge the air intake on the side of the box and blank off any chambers on the side of the box.