Champion Spark Plug Spark Plug P/N:509
Keep every cylinder firing on your classic GM or Mopar with the Champion Copper Plus Spark Plug 592C (plug type RJ12C). It's a direct-fit replacement across a huge span of vintage applications — including the 1938-1942 Buick Century Series 60, 1957-1959 Chevrolet Bel Air, 1962-1966 Chevrolet C10 Pickup and hundreds more. See the "Vehicles it fits" section for the full list.
Champion Copper Plus plugs deliver dependable ignition using proven copper-core technology: the copper center electrode provides strong conductivity and controlled heat range for consistent sparks, while the coated shell adds corrosion resistance.
Built to meet OE fit, form and function. Quantity varies by engine — the listed applications call for 6 or 8 plugs, so order the correct count for your vehicle. Country of origin: Mexico.
Interchange: 306 · RJ12C
This part cross-references / interchanges with the following part numbers:
What is the Champion 592C?
It's a Champion Copper Plus spark plug (plug type RJ12C) with a copper-core center electrode and a resistor design, built to meet OE fit, form and function.
Is this spark plug pre-gapped?
Yes, it ships with a pre-gapped design to simplify installation. Always verify the gap against your engine's specification before installing.
Does it include a washer, and what seat type does it use?
Yes, it comes with a crush washer and uses a flat seat.
How many plugs do I need for my vehicle?
Quantity varies by engine — the listed applications call for 6 or 8 plugs. Check the "Vehicles it fits" section for your specific vehicle and order that many.
Does the 592C have a resistor?
Yes, it uses modern resistor technology that helps minimize electrical interference to protect sensitive electronics.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.