If you are still running the 6-volt system on your car, truck or even tractor, the generator is your weak point. Even at highway speed that old generator cannot put out enough to keep up with the lights, heater motor and radio. This alternator puts out 60 amps at 7.5 volts at highway speeds, up to 30 amps at idle, and has the regulator built in. It includes the required plug and can be installed on almost any engine by modifying or purchasing a new mounting bracket.