Catalytic converters

There's no catalytic converters listed in the 1974 Chrysler passenger car parts catalog and no mention of converters in the 1974 Chrysler service manual. They first appeared in the 1975 parts catalog and service manual. The following was taken from the 1975 Chrysler technical service bulletin number 11-01-75 :The Clean Air Act requires more stringent emission controls on 1975 model vehicles. In order to accomplish such control levels and still maintain acceptable driveability and operational integrity of such vehicles, Chrysler Corporation will be installing a catalytic converter into the engine exhaust systems of many of its 1975 vehicles.