NGK plug range?
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NGK plug range?

  1. #1
    Living in a cage of fear thatguy's Avatar
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    Default NGK plug range?

    What would be one step hotter plug than an NGK 4554??

    That is the # summit gives for the recommended plug for the Brodix heads.
    I want to try one range hotter.

    (I've ran that number for a couple years.)

    Thanks!!
    Tommy
    Quote Originally Posted by Rexone View Post
    Tommy please remove all Jimsplace quotes from your sig and don't put more back. He doesn't like it and it is against the rules. Thank you.
    "So as through a glass, and darkly
    The age long strife I see
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    Many names, but always me."

    Gen. George S Patton

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  3. #2
    Member Wetnreckless's Avatar
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    Default

    Stock # 4091 ( R5671A-7 ) would be one step hotter than the #4554.
    It looks like the 4091 is the hottest plug in the series. -7 thru -11.

    Danny

  4. #3
    Living in a cage of fear thatguy's Avatar
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    Quote Originally Posted by Wetnreckless View Post
    Stock # 4091 ( R5671A-7 ) would be one step hotter than the #4554.
    It looks like the 4091 is the hottest plug in the series. -7 thru -11.

    Danny
    Thank you very much!!
    Tommy
    Quote Originally Posted by Rexone View Post
    Tommy please remove all Jimsplace quotes from your sig and don't put more back. He doesn't like it and it is against the rules. Thank you.
    "So as through a glass, and darkly
    The age long strife I see
    Where I fought in many guises,
    Many names, but always me."

    Gen. George S Patton

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