What type of spark plug wire do I need? Matt May 23, 2018 15:43 Follow You need a good quality resistor/ suppression core wire. The stock Harley Twin Cam wires work well. Dynatek also carries quality wire kits. Dynatek does not recommend the use of Nology wires with our microprocessor controlled ignition systems. Related articles What is the difference between Single Fire and Dual Fire? What are the benefits? Comments 0 comments Please sign in to leave a comment.