Re: NGK Plug cross over

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March 20, 2017 at 2:56 pm #54596
Mumbles
Participant

    The NGK B8S are closest to a J4J and are a good starting point for motors requiring the J4J. B6S replace the J6J.

    One thing to remember about the NGK’s is their numbering system. It is the opposite of Champion and the higher the number, the colder the plug.