One of the smallest packages delivers high output with advanced magnetic core technology Designed for use with Dyna 2000 and 3000 series ignitions, factory-installed electronics, or with aftermarket ignitions that employ dwell control Secondary resistance is 11.5 ohms Great for customs where coils need to be hidden Not for Twin Cam applications. Not for use with the Dyna "S," DYNA III or earlier generation ignitions.. COIL 3-OHM 2-PLUG/1-FIRE