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Intake Manifold Joint, Intake Manifold Vacuum Fitting 90° 3/8NPT-1/4 Hose Nipple Car Modification 4535Z, Intake Manifolds - Amazon Canada
LS1 Intake Manifold Vacuum Port Fitting MAP 97-04 Camaro Corvette 5.7L 840 | eBay
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TheSamba.com :: Beetle - Late Model/Super - 1968-up - View topic - Vacuum Port on Intake Manifold?
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Information about the vacuum port disc on the side of the intake manifold. Volvo 850, S70, V70, etc. - YouTube
