Ultima Single Fire Ignition Kit - EVO/Blockhead. We have removed that "Made in China" coil and replaced it with a U. If you haven't looked at the blogs, please do. The majority of the negative remarks about this kit is the inferior Chinese coil. The replacement in OUR Kit is the high energy, more reliable Ultima Single-Fire Coil (Part # 53-434). Increase your performance, horsepower, fuel economy, spark plug life, ease of starting and ride comfort and do it with just one easy to install kit. You can also change your throttle curves, program your rear cylinder offset and raise ...