CCH10 Copper Plus spark plug. J12YC

Champion Copper Plus J12YC spark plugs are a reliable choice for keeping your vintage iron running smooth. These 14mm threaded plugs feature a 1/2 inch short reach and are specifically designed for 1948 to 1974 Big Twin models. Built with a copper-core center electrode, they provide excellent thermal conductivity and durability under load. The patented Ultraseal coated shell is a great addition for any rider, as it resists corrosion and keeps the plugs looking clean even after miles of road grime. They serve as a direct replacement for OEM 32337-04 and require a standard 21mm spark plug socket for installation. This set is sold as a set of four, ensuring you have a full refresh for your classic Harley-Davidson.