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The Rocker Arm in Dodge Challenger vehicles plays an important role in the operation of the internal combustion engine specifically the valvetrain system whose function is to transfer the motion generated by the pushrod to the intake and exhaust valves. Normally made from stamped steel or aluminum, the Rocker Arm is used for turning the movement of the pushrod vertically into the required amount of force to lift the valves. For high RPM automotive use, aluminum is used because of its light weight nature, while cast iron or forged carbon steel is used in diesel engines. Some of the Dodge Challenger models may integrate roller rockers which employs needle bearings thereby converting the required manual friction to efficiency in its superior designs. The rocker ratio varies from 1.5:1 to 1.8:1 in the modern engines and, as the outcome of that, it becomes possible to increase lift of the camshaft. Fulcrum bearings are also used in these engines to address stresses and to increase the durability of the Rocker Arm in high RPM applications as used in the Dodge Challenger vehicles.