had a wheelbase, while the six-cylinder had a wheelbase. Both engines increased displacements with the six going to producing and the eight to rated at . From 1940 through 1942, the Pontiac Torpedo was the brand's only model built on three different bodies: the "A" body shared with Chevrolet, the "B" body shared with Oldsmobile and Buick, and the "C" body shared with the large Oldsmobile, Buick, and the small Cadillac. It shared some appearances with the Opel Kapitän. In 1941 the Pontiac Streamliner appeared with a straight-8 engine, and on February 2, 1942, the last civilian Pontiac automobile was manufactured in the United States, as all automobile factories converted to military production. The prewar through the early 1950s Pontiacs were not powerful as they featured the heavy and long Pontiac straight-8 engine, which was less expensive to produce than the increasingly popular V8s. Their long crankshaft suffered from excessive flex, thus limiting them to a low compression ratio with a modest redline. 1946–1954 From 1946 until 1948, all Pontiac models were essentially 1942 models with minor changes. The Hydramatic automatic transmission was introduced in 1948 and helped Pontiac sales grow even though their cars, Torpedoes, and Streamliners, were becoming out of date. The first all-new Pontiac models appeared in 1949. They incorporated styling cues such as lower body lines and rear fenders that were integrated into the rear-end styling of the car. The Chieftain line was introduced to replace the Torpedo. Built on the GM B-body platform, the Chieftain featured different styling from the Streamliner. In 1950, the Catalina pillarless hardtop coupe was introduced as a "halo" model, similar to the Chevrolet Bel Air of the same year. In 1952, Pontiac discontinued the Streamliner and replaced it with additional models in the Chieftain line built on the GM A-body platform. This single model line continued until 1954 when the Star Chief was added. The Star Chief featured a stretch to the A-body platform giving it a wheelbase. The 1953 models were the first to have one-piece windshields instead of the previous two-piece units. While the 1953 and 1954 models were heavily reworked versions of the 1949-52 Chieftain models, they were engineered for the V8 engine that was supposed to be introduced on the 1953 models, but the Buick division complained to GM's management that the introduction might take sales away because Buick was introducing the new nailhead V8 in