Carrera Intake Manifold Adapter SetTurboKraft Carrera Manifold Adapter Sets are designed for simply adap the 911 Carrera 3. 2L intake manifold to the 930 Turbo engine. With an intake runner port size of 41. 5mm, the 911 Carrera manifolds make an excellent choice for high performance engines requiring additional airflow as part of an EFI conversion. Turbo cylinder head ports are only 32mm inside diameter. If you attempt to use a factory 3. 2 Carrera intake insulator and gaskets, you'll