Exhaust manifold stud. PartQualifier: upper. upper. Fastener with threads on both ends to either attach the exhaust manifold to the cylinder head or the exhaust pipe to the exhaust manifold. Turbocharger Stud. Flange. Boost sensor. Mnfd w/converter. Turbocharger. Included with: Exhaust manifold, Manifold, Manifold with converter.