GM Family II engine

The Family II is a straight-4 piston engine that was originally developed by Opel in late 1970s for use in the Opel Ascona B and Opel Kadett D (and their corresponding sister models the Vauxhall Cavalier Mk 2 and Vauxhall Astra Mk 1. Over time, the engine block has evolved to include many modern features such as DOHC and fuel injection. Family II has also expanded to include a range of Opel derived 6 cylinder engines. Many General Motors subsidiaries, including Holden, GM do Brasil and recently GM Powertrain have adopted this design. It is also starting to be used in hot rods as an engine swap.