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Iridium Long Life
DENSO's patented Iridium alloy is more durable than even Platinum, allowing the center electrode to be shrunk to only 0.7 mm in diameter. This produces a dramatic improvement in ignitability and spark plug life. DENSO's Iridium Long Life spark plug is standard equipment with a number of automakers including GM, Toyota, Honda, and Mitsubishi.

  • Fine-wire iridium center electrode
  • Platinum ground electrode
  • 360 degree laser-welded spark tip
  • Sustained spark performance over 100,000 miles
  • Withstands higher pressures and temperatures
  • Reduced spark plug wear and erosion

Spark Plug Type Performance Differences

Gap Size0.044 In.
Thread Diameter0.551 MM
Ground Electrode Quantity1
Manufacturer Heat Range16
Hex Size16.0
Reach19.00 mm
Resistance5000 Ohms
Center Electrode Core MaterialCopper
Seat TypeFlat
Center Electrode Tip MaterialIridium-Rhodium Alloy
Ground Electrode Core MaterialNickel
Ground Electrode Tip DesignPlatinum Chip
Ground ConfigurationStandard
Alternate/OEM Part Number(s): 000018F287, 1883911051, 33002750, 4318138, 4504277, 4606823AB, 4609040, 56027275, 56028189, 56028236AA, 56041402AB, 5862052360, 5862052370, 83500411, 93176801, 980795514G, 980795514N, 980795514P, 980795515G, 980795515N, F28718110, F28818110, SKJ16CRL11, SP0RC12ECC, SP0RC12LC4, SP0RC12LYC, SP0ZFR5F11, SPRC12MCC4, T0714540

DENSO Warranty Information:
12 months on A/C Evaporator Cores, A/C Compressors, A/C Compressor Clutches, A/C Condensers, Radiators, Fuel Injectors, Fuel Pumps, Fuel Tank Sending Units, Ignition Coils (COP), Alternators, Starters, and Mass Air Flow Sensors. Parts subject to normal wear and tear are not covered (Filters, Ignition Wires, Oxygen Sensors, Spark Plugs, Wiper Blades, etc.). IMPORTANT A/C COMPRESSOR WARRANTY NOTE: In order to ensure that proper warranty credit is issued if needed, the compressor installation instructions must be adhered to. All compressors returned for defect must show proof of purchase of an A/C Orifice Tube (or A/C Expansion Valve), A/C Receiver Drier/Accumulator, and A/C System Flush or a Work Order showing the purchase of these items and that the system was flushed.