What are spark plug wires?

[Harley]

Spark plug wires are the cables that conduct the high voltage generated by the ignition coil to the spark plugs, also known as distributor wires, ignition wires, or high-voltage ignition wires. They are an essential part of traditional ignition systems, serving as the medium through which the ignition coil transfers its energy to the spark plugs. More related information is as follows: 1. Spark plug wires are generally divided into four parts: conductive material, insulation rubber, ignition coil connector, and spark plug connector. 2. Number of wires: The number of spark plug wires corresponds to the number of engine cylinders, commonly four, six, or eight cylinders, with three or twelve cylinders being rare. Some special vehicles may have an indeterminate number of cylinders. With technological advancements, many modern vehicles no longer use separate spark plug wires, as they are now integrated with the ignition coils, with one coil per cylinder. This significantly reduces the size and provides more convenient conditions for single-cylinder independent ignition.