The first series production V6 was introduced by Lancia in 1950. Other builders soon started using V6 engines. In 1959, General Motors built a heavy-duty 305 in3 (5 L) 60° V6 for use in their pickup trucks and Chevrolet Suburban. The engine was later enlarged to 478 in3 (7.8 L) for heavy truck and bus use.
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