Works with all Dyna S and Dyna 3 point ignitions, aftermarket electronic ignitions, and factory ignitions. 2.2 ohm dual output coils. Generally, 2.2-3 ohm coils are used for electronic ignitions while 4-5 ohm coils are used for point ignitions. Lower resistance coils can be used on points with the consequence being faster point wear.
Sold as a pair.