Champion – Copper Plus – Spark Plug fit for 1957-1978 Sportster XL

• 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:7/16″ / 11.1 MM

Hex Size:17.5 MM / 11/16″

Heat Range: 8

Gap: .030″