here's a link to the "Sopngerider Method". The pics are gone but you can get an idea. [ http://www.twinturbo.net/net/viewmsg.aspx?forum=main&msg_id=618470 ] You can find the 2" rubber cap at any hardware store in the plumbing section. Just like SirpriZ said, you are pressurizing the intake & listening for leaks. In my case the culprit was the hose coming off the driver's side turbo. It was hard as hell to get to but well worth the effort since my car seems to be twice as fast now.
