Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Holden straight-six motor is a straight-six engine produced by General Motors Holden''s in Australia between 1948 and 1986. Initially dubbed the Grey motor alluding to the colour of the cylinder block, later iterations came in the form of a Red, Blue, Black and the four-cylinder Starfire engine. These engines were fitted to all Australian-designed Holdens of the same years, and the four-cylinder Starfire notably found its way into the Toyota Corona.