Iridium Long Life; Pre-Set Gap: 0.044"
Features & Benefits:
  • LIFESPAN / DURABILITY | Iridium alloy is 6X harder and 8X stronger than Platinum
    • Iridium with Rhodium Center Electrode -- DENSO uses the highest concentration of Iridium of any spark plug and outperforms in the most severe engine temperatures, resisting oxidation and voltage wear for over 100,000 miles.
    • Platinum Ground Electrode -- extends the life of the plug by resisting gap erosion.
    • Patented 360-Degree Laser Welding -- creates the highest quality bond for structural support of the center electrode.
  • PERFORMANCE / IGNITABILITY
    • 0.7 mm Fine Wire Iridium Center Electrode -- improves ignitability for more horsepower, faster easier starts and fewer misfires under heavy loads.
Which DENSO Spark Plug Is Right For You?

Material / SeriesLifespan / DurabilityPerformance / IgnitabilityEfficiency / Fuel Economy
Copper / Nickel U-Groove
U-Groove
Platinum Twin Tip
Platinum Twin-Tip
★★★★★★★★
Double Platinum
Double Platinum
★★★★★★★★★
Iridium Twin Tip
Iridium TT
★★★★★★★★★★★★★
Iridium Power
Iridium Power
★★★★★★★★★★★★
Iridium Long Life
Iridium Long Life
★★★★★★★★★★★★