AC Delco spark plugs - NCRS Discussion Boards

AC Delco spark plugs

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  • lyndon sharpton

    AC Delco spark plugs

    Any one know about plugs that have a X after them. I have some R43TS then ran across some R43TSX what is the X for?
  • Joe C.
    Expired
    • August 31, 1999
    • 4598

    #2
    Re: AC Delco spark plugs

    Wide gap for High Energy Ignition.

    Comment

    • mike cobine

      #3
      Re: AC Delco spark plugs

      The X is for a .060 factory gap. The standard TS is a .035 factory gap that can of course be changed. However, stretching it out to .060 is a bit extreme. The -X version is already there.

      There is also an -8 version that is a .080 gap.

      As usual, you should always check your gap as the factory gap may not be accurate at time of installation.

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