While wandering around the web I came across this page that summarizes info on NGK (and some Champion) spark plugs. Have seen similar charts other places as well, this one is pretty decent. URL:
http://www.offroadhaven.com/spark_plug_information.htm
Basically it is an explanation of the numeric codes used on NGK spark plugs.
http://www.offroadhaven.com/spark_plug_information.htm
Basically it is an explanation of the numeric codes used on NGK spark plugs.
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