Mitsubishi 20G

This turbo is identical to the 16G on the turbine side, but has a much larger compressor section. The small turbine means good spool-up, but the large compressor section can produce very high airflow volumes to make 25psi of boost or more, and a maximum of around 450 horsepower.

The high volumes of exhaust produced by this much boost mean the internal wastegate is no longer adequate, and a 20G is normally installed with the internal wastegate welded shut and replaced by an external wastegate.