How to Match a G Series II Turbo to the Engine

Turbocharger selection becomes clearer once the family name is separated from the actual model. The G Series II range covers several sizes associated with the G25, G30, G35, G42, G45, and G55 designations.

Those units do not share one powerband or response characteristic.

They address different combinations of displacement, engine speed, airflow, fuel, and available space. A badge can identify the design family, but it cannot determine whether a turbocharger suits a commuter car, a track build, or a high-rpm competition engine.

G Series II

turbocharger sizing guide