GM Family II Engine
The Family II is a straight-4 piston engine that was originally developed by Opel in the early 1970s. It was used in the Opel Ascona and Opel Kadett and their corresponding sister models the Vauxhall Cavalier and Vauxhall Astra. In the US the SOHC engine was available from 1982 to 1990 including a turbocharged version known as LT3.
Over time, the engine evolved to include many modern features such as DOHC and Gasoline direct 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.
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