Twin Power 99-01 FLH With EFI Ignition Coil Black Replaces H-D 31639-99

Twin Power™ coils are the high-quality direct fit with at least 20% more voltage than stock. Constructed from durable high-quality, molded-epoxy, in a late O.E.M.-style molded case, these ignition coils improve starting, prevent high-speed misfires and increase overall performance. They are available in black and chrome, and come with a one-year manufacturer's warranty.