Spark plugs

Neil T

Active Member
Hello everyone , would everyone know what the BYC stands for on my champion plugs there N9BYC ???
 
N is the thread size, 9 is the temperature range of the plug, B is the type of centre electrode (fine wire in this case), Y / C is the material of the centre electrode (nickel with copper core)
I'm no expert I just looked it up on tinternet :)
 
Thanks again I couldn’t find anything manly what the letter B was for , I found they are quite common though
 
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