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Hey All, does anyone know what the NGK equivalent to the Harley Plug would be? I have looked everywhere and can't seem to find anything close to Harley Part #31600012 (RG6HCC). Any help, I would really appreciate it!
 

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I Never did an actual Dyno or Ignition Test using both plus. The Iridium are less prone to wear. And have a Fine Tip. If you go to a Auto Parts store, Look at both. You'll see the difference.
 
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