Holden up until 1986 built their own straight-sixes, adapted from a Chevrolet design. A unit (known as the "grey" motor) was used until 1963, with a minor increase in displacement in 1960 to when it was replaced by a newer Chevrolet based design (known as the "red" engine) which was offered in different capacities. Holden engine sizes included the , , (1964–1966), , (1971–1984), (1968–1971), and (1971–1986, the largest and most popular of the series). This motor was firstly replaced by an imported RB20/30 Nissan straight-six, offered in (in New Zealand) and forms, until Holden's Buick designed V6 replaced it outright in 1988. Holden now make and use the new global HFV6 in their local and export passenger cars.