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Thread: spark plug type

  1. #1
    Junior Member APPRENTICE
    Join Date
    Aug 2005
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    16

    spark plug type

    i have 440-1 indy heads 15to 1 comp flat top pistons. i was wondering can i use a extended tip plug. i use ngk R5671A-9 was wanting to try a R5672 Series plug. Thanks

  2. #2
    Senior Member RACING JUNKIE mopar1968's Avatar
    Join Date
    Dec 2006
    Location
    Abingdon,Virginia
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    3,579
    No do not use extended type plug, I use RJ12YC Champion in mine :!: Extended tip might hit piston :!: JMO Mark
    Head's up the true drag race!!

  3. #3
    Junior Member APPRENTICE
    Join Date
    Aug 2005
    Posts
    16
    thanks Mark . i should have said projected tip plug ? do you use the rj12yc in the Indy heads ?


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