HuffyDavidson Motorized Bicycle High Performance Lightning CDI Spark Plug Coil Replacement &ndash; Gas Bike Lightning CDI Replacement DIRECT REPLACEMENT: This is a direct replacement coil for the Huffy Davidson Lightning CDI. It is NOT a stand-alone unit and requires an aftermarket CDI to use this coil. EASY INSTALLATION: Just remove your unplug your old coild and plug in your new HuffyDavidson coil and you're good to go. PACKAGE INCLUDES: 1x HuffyDavidson CDI Coil Replacement