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  1. #1

    Difference between RC7PYCB and RC7PYCB4 spark plugs

    Hi,

    I'm new around here and hoping to get a bit of pro advice.

    I've found a bunch of new RC7PYCB4 plugs lying around in storage and wonder if they are compatible with the RC7PYCB plug required by HSR.

    https://www.championsparkplugs.com/p...aspx?zpid=8678
    https://www.championsparkplugs.com/p...aspx?zpid=8682

    The only difference I see on the 'specs' pages above is that the RC7PYCB has a specified gap of .040" (1.0mm) whereas RC7PYCB4 does not.

    Am I correct to assume that I can just take the RC7PYCB4 plug, make sure that I have a .040" (1.0mm) gap and call it a day?

    Thank you



  2. #2
    yes--they are the same plug with the one ending in "4" being a "wide gap" plug--meaning its ground electrode is a bit longer so it can be be gapped to a wider gap.

    It's actually pregapped to .040 according to the detail spec on the link you provided. verify that it is .040 and you're good to go

    http://www.sparkplugs.com/Data/uploa...ing_system.jpg

    or

    http://www.sparkplugs.co.uk/pages/te...-plug-code.htm

  3. #3
    Thank you. Much appreciated!

    Quote Originally Posted by jetboater View Post
    yes--they are the same plug with the one ending in "4" being a "wide gap" plug--meaning its ground electrode is a bit longer so it can be be gapped to a wider gap.

    It's actually pregapped to .040 according to the detail spec on the link you provided. verify that it is .040 and you're good to go

    http://www.sparkplugs.com/Data/uploa...ing_system.jpg

    or

    http://www.sparkplugs.co.uk/pages/te...-plug-code.htm

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