One of the smallest packages delivers high output with advanced magnetic core technologyDesigned for use with Dyna 2000 and 3000 series ignitions, factory-installed electronics, or with aftermarket ignitions that employ dwell controlSecondary resistance is 11.5 ohmsGreat for customs where coils need to be hiddenNot for Twin Cam applications.Not for use with the Dyna ''S,'' DYNA III or earlier generation ignitions.