POWERMADD E3 Resistor Spark Plug — Projected center electrode, 14 mm thread, 19.1 mm reach – 75-86 Big Twin, 80, 83-90 Touring, 84-91, 93-94 FXR, 00 CVO, 84-85 Sportster
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Diamond Fire electrode shape for faster, more complete combustion and improved engine performance.