Champion - Copper Plus - Spark Plug fit for 1978-1979 Big TwinCopper Plus spark plug has a copper core center electrode that allows for accurate control of heat range, optimizing performance and longevity of the spark plugPatented SAC-9 semi-conductor resi
Champion – Copper Plus – Spark Plug fit for 1978-1979 Big Twin
Thread Reach:3/4″ / 19.1 MM
Hex Size: 13/16″ / 20.6 MM
Heat Range: 12
Gap: .040″
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