The Holden straight-six motor is a series of straight-six engines that were produced by General Motors Holden at their Port Melbourne plant between 1948 and 1986. The initial Grey motor was so dubbed

The Holden HG is an automobile which was produced by Holden in Australia between 1970 and 1971. It was marketed under Belmont, Kingswood, Premier, Brougham and Monaro model names.