Deliver dependable ignition with the Champion Copper Plus 841-1 Spark Plug (J8C), a pre-gapped plug with a copper-core center electrode for consistent sparks. It fits many vehicles, among them the 1958-1968 Chevrolet Impala, 1949-1961 Chevrolet Suburban and 1967-1968 Chevrolet Camaro. See the Buyer’s Guide tab for the full list and engine codes. Champion builds it to meet OE fit, form and function, and it installs as a direct-fit replacement for the listed applications.
- Copper core precision: The copper core center electrode allows accurate control of heat range and is designed for longer life and dependable performance. The center electrode tip is nickel.
- Corrosion resistance: A coated shell resists corrosion in harsh environments.
- Easy to install: It comes pre-gapped at 0.030 in (0.76 mm) to simplify installation.
- Dependable starts: Engineered for reliable ignition in all weather conditions.
This standard replacement plug has a 14 mm (0.551 in) thread diameter and a flat seat, and a crush washer is included. It is a non-resistor design. The number of plugs needed varies by engine: the listed applications use 4, 6, 8 or 16. Country of origin: China.
Hard starting, misfires, a rough idle, or worn or fouled electrodes can be signs a spark plug may need replacing. Ignition and fuel problems can cause similar symptoms, so diagnose the cause before you replace parts.
Interchange: J8C
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