The fourth generation of Chrysler Imperial was unveiled in 1937. The fourth generation Imperial was offered exclusively as a four door, seven seat limousine powered by a 5.3L inline eight engine. Alongside the standard models, the Custom series, which featured additional luxury, as well as a sleeker appearance due to the removal of the rear quarter panel windows. Production of the fourth generation Imperial lasted until 1939, when the Fifth Generation Chrysler Imperial was unveiled.