Champion – Copper Plus – Spark Plug fit for 1975-1981 Big Twin 1984-2000 Big Twin Evo

• 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: 20.6 MM / 13/16″

Heat Range: 12

Gap: .040″