Abstract: An engine intake manifold assembly including a first portion configured with a first material and a second portion configured with a second material, wherein the first and second portions are adhesively bonded together. Preferably, the intake manifold assembly is additionally configured with a cylinder head flange, for mounting the same to an automotive engine component, and a throttle body attachment for attachment of a throttle body component. The cylinder head flange and throttle body attachment may be an integral component of the first or second portions or attached to the same during or after assembly of the first and second portions. Optionally, an insert is located between the assembled first and second portion to create one or more plenums thereby creating one or more air flow paths through the intake manifold assembly.

Abstract: A gas-assisted injection molding article suitable for plating and a method for plating the article is disclosed. A sleeve is selectively mounted on an upstanding gas injection stud formed on the molded article. The sleeve seals an aperture which extends through the sidewall of the gas injection stud to the hollow interior of the molded article. The sleeve is preferably formed of a heat shrinkable thermoplastic. After the sleeve has been mounted to the article, the sleeve is subjected to a source of heat such that it retracts and is securely mounted to the gas injection stud. With the aperture sealed, the article can now be submerged in a suitable plating bath or other liquid medium.