Pipercross filters?

[Will]

http://cgi.ebay.co.uk/PIPERCROSS-Universal-Filter-75mm-ID-Rubber-Neck-PK004F_W0QQitemZ200381059809QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item2ea7a452e1&_trksid=p4634.m351.l1262

Anyone ever used one of those? Any ideas what they like? What would the pro's and con's be of using one of those?
Cheers

 

[Shaun Cook]

iv heard good things but its as good as sticking a bit of sponge on ur throttle body