Iv never seen any thing like this before.probably a old hair dryer does any one have one? more to the point does it even do any thing??????????????????
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=7900445759&category=32094

this came up the other day i think, an aprently its just a filter of a big supercar, i cant remeber which post or who did it though. anyone else any ideas on it??

I posted it in one of the general forums last week. It looks like a heater fan out of a car! It COULD work though, if it can supply enough air for an engine at maximum revs. But, even if it WAS effective, there's no way I'd waste £100 on a part that you can get for a fiver from any scrappy