Where did you get the piping from?
As per msn and FAO anyone else who wants the info.
This is the link to the piping used :
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=260320689364
Its 90mm diameter, 1m length and fits snugly over the air feed duct at the front of the engine bay, using a couple of 370mm cable ties to keep it attached to the duct