Count on dependable ignition performance from the Champion Copper Plus Spark Plug 14 (plug type RJ12YC), built around proven copper-core technology. It fits many vehicles, among them the 1960-1970 Chevrolet Impala 4.6L / 5.0L / 5.3L / 5.4L / 5.7L, the 1966-1978 Dodge Charger 6.3L / 6.6L / 7.2L and the 1967-1970 Chevrolet Camaro 5.7L. See the "Vehicles it fits" section for the full list.
The copper-core center electrode gives strong conductivity and controlled heat for a consistent spark, and a coated shell guards against corrosion. Champion builds this plug to meet OE fit, form and function.
- Copper core precision: The copper-core center electrode, with a nickel tip, allows accurate control of heat range. It is designed for longer life and dependable performance.
- Corrosion resistance: A coated shell helps resist corrosion in harsh environments.
- Built-in noise suppression: Resistor technology helps protect sensitive electronics by minimizing electrical interference.
- Easy to install: The plug comes pre-gapped at 0.035 in (0.90 mm). It has a flat seat, and a crush washer is included.
This standard-replacement, non-indexed plug has a 14 mm thread diameter and is engineered for reliable ignition in all weather conditions. The number of plugs needed varies by engine; for example, the listed V8 applications use eight. The minimum order quantity is 4. Country of origin: China.
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
437, CR43S, R42S, R43CS, R43S, R44S, 84, 85, W145TR6, W175TR6, W95TR6, WR7F, OJ11Y, RJ10Y, RJ11Y, RJ12Y, RJ12YC, RJ87P, XJ10Y, XJ11Y, XJ12Y, XJ9Y, 5046, W20PRU, 33896329014, 4091933, 4339425, AR32, AR42, AS42C, BPR6S, 14R32, 14R42, ESP035, G5RTV
Frequently Asked Questions
Is this the right Charger plug for a 1966-1978 Dodge Charger 6.3L / 6.6L / 7.2L?
It's listed for the 1966-1978 Dodge Charger with the V8-6.3L, V8-6.6L and V8-7.2L engines. Check the "Vehicles it fits" section to confirm your exact year and engine.
What is the pre-gap on this spark plug?
It comes pre-gapped at 0.035 in (0.90 mm). Before installing, check that against the gap your vehicle's service information calls for.
Does this spark plug come with a washer?
Yes. This plug uses a flat seat and includes a crush washer to seal it.
How many of these spark plugs do I need?
It varies by engine. For example, the listed V8 applications use eight. Check the "Vehicles it fits" section for the count for your engine. The minimum order quantity is 4.
What are signs my spark plugs may need replacing?
Common signs include misfires, a rough idle, hard starting, hesitation and lower fuel economy. These symptoms can have other causes, so diagnose the problem before replacing parts.
