CHOOSE CONSISTENT COMBUSTION: the Champion Copper Plus Spark Plug employs a copper-core center electrode and patented SAC-9 semiconductor resistor to produce complete and efficient combustion over the life of the spark plug.
Thanks for the very timely and accurate transaction and a very good price for an item that is becoming like hens teeth to find. I fool with older Jeeps, primarily the WWII Willys MB and the Ford GPW and I was very happy to find these plugs.