The XR-1A High-Output Ignition Coil Set is designed specifically for high-compression naturally aspirated, boosted or nitrous-equipped applications making more than 1,000 horsepower, far beyond the capabilities of OEM coils. The spark energy of these coils is comparable to CDI (capacitive discharge ignition) systems without the need to convert. The Smart Coil design also requires no ignitor module. It delivers up to 44,000 volts, 103mJ of energy, and supports a maximum of 19 amps of current and 17 volts. Works with all OEM equipment, as well as FAST? products that support coil-near-plug applications such as the XIM? and EZ-LS? ignition controllers. Able to be used in coil per cylinder applications.