The most famous American passenger car application was the Chrysler system used beginning with the 1957 model year, although Chrysler's "Torsion-Aire" suspension was only for the front; the same basic system (longitudinal mounting) was maintained until the 1981 introduction of the K-car.
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Originating as R4B in 1935, the car was rebuilt as a C-Type by modifying the front end of the chassis frame to accommodate independent Porsche-type torsion bar front suspension.
In December 1941, the Ordnance Corps issued a requirement for the design of a fast tank destroyer using a Torsion bar suspension, the Wright/Continental R-975 engine, and a 37 mm gun.