Spark Plug - 1978-1979 Big Twin
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"