Champion 120 Spark Plug

Champion Copper Plus Spark Plug 120

Champion Copper Plus 120 is a non-resistor spark plug built for dependable ignition performance in a range of classic vehicles and small-engine applications. Its copper core electrode supports strong conductivity and heat control, while nickel electrode materials help maintain consistent wear characteristics.

Compatible With applications such as the 1983 Volkswagen Vanagon, 1968-1973 Nissan 510, and 1967-1968 Chevrolet Suburban models, this Champion spark plug is a direct-fit option for OE-style service where the specified N5C plug type is required.

Key Features

• Copper core electrode for improved conductivity and heat management
• Nickel center electrode tip and nickel ground electrode core material
• Non-resistor design for applications that call for a resistor-free plug
• Flat seat type with 14 mm thread diameter and 0.75 in reach
• Pre-gapped at 0.026 in / 0.64 mm for reference during installation
• Champion Copper Plus small engine classification
• Part number 120, plug type N5C

Product Details

Champion Copper Plus 120 is engineered around a copper core design that helps transfer heat efficiently while supporting stable spark delivery. The nickel electrode construction and flat-seat configuration align with OE-style service requirements for older ignition systems, including Volkswagen Vanagon, Nissan 510, and Chevrolet C10, C20, K10, and K20 Suburban applications listed in the fitment data. This part number 120 is also cross-referenced by OSC 4235 for the same application.

Common Issues This Spark Plug Can Address

• Hard starting caused by worn or fouled spark plugs
• Misfire from weak or inconsistent spark output
• Rough idle related to aged ignition components
• Reduced throttle response from degraded plug performance
• Service intervals overdue on non-resistor ignition systems

Installation Notes and Tips

• Verify the vehicle calls for plug type N5C before installation.
• Check the specified gap for the application; listed fitment notes include 0.028 in, 0.032 in, 0.035 in, and 0.025 in depending on vehicle.
• Confirm thread diameter, reach, and seat type match the cylinder head.
• Use the removable nut terminal only if your ignition lead requires that terminal style.
• For best results, inspect ignition wires, distributor components, and coil condition during service.

Quality Assurance

Champion is a long-established ignition brand, and the Copper Plus line focuses on practical electrode materials and OE-style fitment for service replacement. This spark plug is built to the published specifications for the listed applications, including 1980-1983 Volkswagen Vanagon, 1968-1973 Nissan 510, and 1967-1968 Chevrolet Suburban models.