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Iridium
Champion Iridium spark plugs offer maximum performance regardless of engine or ignition type. Each plug has an extremely fine-wire iridium center electrode that is "laser-locked" to the center electrode, and a platinum V-trimmed ground electrode to ensure the longest life and greatest erosion resistance.

Features & Benefits:
  • Platinum ground to ensure high performance and long life
  • Maintains stable operating temperature under all engine loads
  • Greatest engine performance regardless of engine type or ignition system
  • Extremely fine-wire iridium center electrode laser-locked to center electrode
  • Exclusive Heat-active Alloy allows electrodes to reach optimal temperature quickly
Spark Plug Type Performance Differences



Corona vs. Flashover
Insulator Height0.2 In.
Thread Diameter0.551 In.
Hex Size0.625 In.
Reach0.75 in.
Ground Electrode Quantity1
Manufacturer Heat Range12
Thread Diameter14.000 mm
Hex Size15.880 MM
ClassificationChampion Iridium
Center Electrode Tip MaterialIridium Firing Tip
Ground Electrode Core MaterialPlatinum Pad Surface
Plug TypeRC12WLPB4
Electrical Terminal TypeRemovable Nut
Resistor TypeYes
Alternate/OEM Part Number(s): RC12WLPB4

CHAMPION Warranty Information:
Iridium plugs 7 years - Double Platinum Power 5 years - Platinum Power 3 years - Copper Plus 2 years