TOYOTA 90919-01275 (3499) SC16HR11 IRIDIUM LONG LIFE SPARK PLUG
₵45
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.
Features:
- Fine-wire iridium center electrode
- Platinum ground electrode
- 360 degree laser-welded spark tip
Benefits:
- Sustained spark performance over 100,000 miles
- Withstands higher pressures and temperatures
- Reduced spark plug wear and erosion
Spark Plug Type Performance Differences

|
Resistance |
5000 Ohms |
Ground Electrode Tip Design |
Platinum Chip |
Ground Configuration |
Standard |
Ground Electrode Core Material |
Nickel |
Center Electrode Core Material |
Copper |
Center Electrode Tip Material |
Iridium-Rhodium Alloy |
Gap Size |
0.044″ |
Ground Electrode Quantity |
1 |
Hex Size |
14.3 mm |
Manufacturer Heat Range |
16 |
Seat Type |
Gasket |
Reach |
26.50 MM |
Alternate/OEM Part Number(s): SC16HR11 |
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