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Champion - Copper Plus - Spark Plug fit for 1978-1979 Big Twin Copper Plus spark plug has a copper core center electrode that allows for accurate control of heat range, optimizing performance and longevity of the spark plug Patented SAC-9 semi-conductor resistor for maximum EMI and RFI suppression Patented Ultraseal™ coated shell for rust prevention Thread Reach: 3/4" / 19.1 MM Hex Size: 13/16" / 20.6 MM Heat Range: 12 Gap: .040"
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🇺🇸 Ship from USA · On Agora since 2025
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