DENSO Iridium Spark Plug — 12 mm thread, 19.1 mm reach, 0.9 mm (0.035") spark gap, 16 mm hex, Heat Range 22 – 99-17 Dyna, 99-16 Touring, 01-02, 07, 09-14 CVO, 00-17 Softail, 08-17 VRSC, 86-19 Sportster
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High-durability iridium spark plug that improves ignition consistency and reduces voltage requirements.