Champion 841-1 Spark Plug

Champion Copper Plus 841-1 Spark Plug

Champion Copper Plus 841-1 is a standard replacement spark plug built for dependable ignition performance in a wide range of classic vehicles and small-engine applications. Its copper core electrode supports conductivity and heat control, while the nickel construction helps deliver consistent wear characteristics.

Compatible With applications such as 1959-1973 Jeep CJ5, 1953-1968 Chevrolet Bel Air, and 1962-1968 Chevrolet Corvette, this Champion spark plug is also listed for Pontiac, Cadillac, GMC, and Fiat models across the 1947-1973 range.

Key Features

• Copper core electrode for improved conductivity and heat management
• Standard replacement grade for routine ignition service
• Nickel center and ground electrode tip materials
• Pre-gapped to 0.030 in. (0.76 mm)
• Flat seat design with washer included
• Removable nut terminal for common ignition wire setups
• Non-resistor design
• Champion Copper Plus small engine classification

Product Details

The Champion Copper Plus line focuses on straightforward, dependable ignition service with a copper-core design that helps manage operating temperature and maintain conductivity. Part number 841-1 uses a J8C plug type, 14 mm thread diameter, 0.375 in. reach, and an 8 heat range. The nickel electrode materials and standard center electrode design make this plug a practical OE-style service part for older engines that call for this specification. If you are sourcing Champion 841-1 for a Chevrolet Corvette, Camaro, Impala, or Jeep CJ5, this plug matches the listed application data and supports consistent spark delivery in compatible ignition systems.

This part cross-references J8C for the same application.

What It Helps Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent spark delivery
• Misfire symptoms tied to aged ignition components
• Reduced combustion efficiency in service-worn engines
• Heat control concerns in older ignition setups

Installation Notes and Tips

Verify plug type, thread diameter, reach, seat style, and heat range against the engine specification before installation. The pre-gap is set at 0.030 in., but final gap should always be checked against the vehicle or engine service requirement. Use the removable nut terminal only with the ignition wire style specified for the application, and confirm the washer seat is clean before tightening. For fitment, this plug is listed for vehicles including 1959-1973 Jeep CJ5, 1953-1968 Chevrolet Bel Air, 1967-1968 Chevrolet Camaro, 1958-1968 Chevrolet Impala, and 1947-1955 Fiat 500.

Quality Assurance

Champion Copper Plus spark plugs are built around a copper-core design and nickel electrode materials for dependable service in standard replacement applications. Part number 841-1 is cataloged for confirmed vehicle fitment across 127 applications, including Chevrolet, Pontiac, Cadillac, GMC, Jeep, and Fiat models.