Dynatek Dual Output Coil 3 Ohm For Harley Dyna Performance Replacement Coils are high-tech, top-quality coils, designed for maximum performance, produce spark voltages of more than 30,000 volts and spark energies. Coils work with factory electronic ignitions, points, and aftermarket ignitions. Advanced magnetic core technology of the Dynatek Miniseries Coils delivers high output in one of the smallest packages available. Features: 12-Volt Replacement style high performance coils produce 30,000+ Volts One-year manufacturer's warranty Made in USA Note: Not for Twin Cam applications.