NGK SPARK PLUGS Spark Plug — Thread reach 19.1 mm, Thread size 12 mm, Hex 16 mm (5/8") , Spark gap 0.7 mm – 07-13 Dyna, 07-16 Touring, 09-13 CVO, 10-13 Trike, 07-13 Softail, 03-17 VRSC, 86-87, 96-20 Sportster
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Reliable spark plug with trivalent plating, alumina silicate insulator, triple seals, corrugated ribs, and a copper core for improved heat removal.