oh and K&N is the airfilter brand. Virtually no resistance, reusable and cleanable and basically the best filter you can get. Down sides? they are expensive and quite noisy - but more than made up for with their coolness!
I just used the ahem recycled tubing to join the gap between the filter and the existing tube, like I say, just a bodge until I work out something more permanent.
Rupert
www.littleyellowcar.co.uk