Champion 102 Spark Plug

Champion Copper Plus 102 Spark Plug Overview

Champion Copper Plus 102 is a resistor spark plug built for dependable ignition performance and stable heat control. Its copper core electrode improves conductivity, while nickel-based electrode materials support consistent wear characteristics in classic secondary ignition systems.

This Champion spark plug is identified by part number 102 and plug type RJ6C. It is a practical OE-style choice for older Chevrolet, Buick, Pontiac, and GMC applications that call for a flat seat, 14 mm thread diameter, 0.375-inch reach, and a pre-gap size of 0.030.

Key Features

• Copper core electrode for improved conductivity and heat control
• Nickel center electrode tip and nickel ground electrode core material
• Resistor type design for secondary ignition noise suppression
• Flat seat construction with removable nut terminal
• Champion Copper Plus classification, part number 102
• Plug type RJ6C with 0.035-inch gap references in listed vehicle applications

Product Details

The Copper Plus line focuses on straightforward ignition service with a copper-core design that helps manage operating temperature and maintain consistent spark delivery. On this Champion 102 spark plug, the nickel copper alloy ground electrode and nickel center electrode tip are paired with a 6 heat range to support everyday drivability in older carbureted and distributor-based engines. The 0.813-inch hex size and 14 mm thread diameter make it a direct-match style plug for many vintage GM applications, including Chevrolet Bel Air, Camaro, El Camino, Impala, Monte Carlo, Corvette, and select Buick, Pontiac, and GMC models.

This part cross-references Autolite 124 and 303 for the same application.

What It Helps Address

• Hard starting caused by worn or inconsistent spark plugs
• Misfire from degraded electrode surfaces
• Rough idle in older ignition systems
• Reduced spark stability from heat-related plug wear
• Radio-frequency interference in resistor-equipped ignition setups

Installation Notes and Fitment

Verify plug type RJ6C, flat seat design, 14 mm thread diameter, 0.375-inch reach, and the required gap before installation. Body fitment includes 1970 Chevrolet Bel Air, 1970 Chevrolet Caprice, 1969-1970 Chevrolet El Camino, 1970 Chevrolet Impala, 1970 Chevrolet Monte Carlo, 1969 Chevrolet Camaro, 1968 Chevrolet C10 Suburban, 1968 Chevrolet C20 Suburban, 1967-1968 Chevrolet Camaro, 1967-1968 Chevrolet El Camino, 1967-1968 Chevrolet K10 Suburban, 1967-1968 Chevrolet K20 Suburban, 1967 GMC G15/G1500 Van, 1967 GMC G25/G2500 Van, 1964-1966 Chevrolet El Camino, 1960-1962 Pontiac Laurentian, 1960-1962 Pontiac Parisienne, 1959-1960 Chevrolet Bel Air, 1954-1957 Buick Century, 1953-1957 Buick Roadmaster, 1953-1955 Chevrolet Corvette, and 1954 Buick Skylark. For 1969 Chevrolet Camaro and 1967-1968 Chevrolet Camaro applications, notes specify 300 horsepower engines and up.

Champion 102 is a direct-fit style spark plug for listed applications, but final installation should always follow the vehicle service specification for gap and torque.

Quality Assurance

Champion Copper Plus spark plugs are built around a copper-core design for conductivity and heat management, with nickel electrode materials selected for consistent service life in the specified applications. The part number 102 is supported by detailed OE-style fitment data for classic Chevrolet, Buick, Pontiac, and GMC vehicles.