Hi Phil
Kanaflex is just a generic brand name and it might come in a number of different names. The recommended one is Kanaflex 620WD.
I got a product from Clarke rubber that was stocked as an intake hose, I think its basically the same thing. I think I bought about 2.5 metres and ended up with a bit left over. It will depend on how far forward you mount your filter.
Mines been in for about a year and it seems to be holding up just fine.

Check out this link, you can buy the complete kit ready to go, the price is quite good and good people to deal with
http://www.4-tecperformance.com/inde...oducts_id=1160