Reply To: NGK B6S sparkplugs discontinued

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July 3, 2021 at 2:38 pm #241853
James Calamon
Participant

    The R is for resistor. They added a small resistor to help with radio noise from the ignition system. Should have no effect on sparkplug operation.

    • This reply was modified 5 years, 4 months ago by James Calamon.