I bought a metre length of silicon pipe off ebay for £9 and cut it to size. Ya can use the original jubilee clips from ya existing pipes.

http://cgi.ebay.co.uk/ws/eBayISAPI.d...m=290274754174

Reason for the new pipe is beacuase you need to replace the old main breather pipe,mainly cos the original breather is built into it, and its plastic