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Thread: what spark plug to use

  1. #1

    what spark plug to use

    i have a sbc with vortec heads what is a good plug to start with and what # plug . thanks for your help.

  2. #2
    Senior Member EXPERT BUILDER
    Join Date
    Mar 2003
    I like the NGK plugs! JMO
    I think NGK TR5 is stock replacement for gas. I think they have TR55 and TR6 for different heat ranges. May give you something to start with.
    Some of the other fellows could help better on the small block stuff, I run 8's in a gas BBC

  3. #3
    Senior Member MASTER BUILDER
    Join Date
    Dec 2005
    I use NGK plugs too.

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