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Spark plug wires
From Wikipedia, the free encyclopedia
Spark plug wires (also called high tension leads) are electrical cables used by older internal combustion engines to transmit high-voltage electricity from the distributor to the spark plugs . Tension in this instance is a synonym for voltage. High tension may also be referred to as HT.[1]
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Many modern engines use coil-on-plug ignition, a design that does not use spark plug wires.