Designed specifically for the performance enthusiast, NGK Iridium IX plugs offer super-efficient ignition, improved throttle response, and superior anti-fouling. Stock Heat Range


* Fine Iridium tip ensures longevity.
* Iridium alloy has an extremely high melting point, perfect for today’s high-tech performance engines.
* "Trivalent Metal Plating" provides superior anti-corrosion and anti-seizing properties.
* Outstanding acceleration, fuel efficiency, and durability.

LTR6IX-11 NGK Iridium IX Spark Plugs Stock Heat Range

  • 554: 5K Ohm
    Center Electrode Core Material: Copper Core
    Center Electrode Tip Material: Iridium
    Gap Size: 0.044
    Ground Configuration: Standard
    Ground Electrode Core Material: Nickel Core
    Ground Electrode Quantity: 1
    Ground Electrode Tip Design: Taper Cut
    Hex Size: 5/8"
    Insulator Height: 53.00
    Manufacturer Heat Range: 6
    Reach: 25.00
    Resistance: 5000
    Seat Type: Tapered
    Thread Diameter: 14.00

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