found the thread, it was micky lol some 50mm 90 degrees pipe and this in the link below, an airfilter of your choice, so long as it fits the pipe lol http://cgi.ebay.co.uk/45mm-1-3-4-Silicone-...6#ht_1376wt_876 hope this helps and could some 1 please confirm that the aluminium pipe would need to be a 90 degree angle?