NGK B12N Spark Plug Copper Core

The NGK B12N is a discontinued spark plug that is no longer manufactured. Where a current equivalent exists it is shown in the alternatives below.A conventional NGK nickel-alloy spark plug with a copper-cored centre electrode. The copper core carries heat away from the firing tip quickly, which lets the plug run cooler under load while still burning off deposits at low speed, so it resists both overheating and fouling better than a plain nickel plug. NGK's standard range is the direct replacement where a conventional plug is specified and remains the sensible choice for cla