Genuine Porsche Fuel Vapor Vacuum Diaphragm.
On then 944's, this diaphragm is the culprit of many vacuum / boost leaks on the 944 and 944 Turbo and is often overlooked. It's located between the fuse panel and left strut tower. Over 50% of those tested are faulty. Since it's connected to a vacuum hose that connects to your throttle body, it's the equivalent of a vacuum leak at the throttle body.
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