i have also read alot that this one works fine because its a twin piston
http://cgi.ebay.co.uk/Bailey-Motors...ryZ72205QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
sorry for starting a thread about these dump vavles just they must work ok because i have been to a few VAG shows lately and i have seen no end of them on 1.8ts