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Spark Plugs and Glow Plugs - NGK Iridium IX Spark Plugs
The improved throttle response, superior anti-fouling and high-ignitability makes NGK Iridium IX® Spark Plugs ideal for the performance enthusiast. Iridium’s extremely high melting point is perfectly suited to today’s high-temperature engines, delivering outstanding acceleration, fuel efficiency and durability.

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Items 1-25 of 49
Description: Spark Plug, NGK Iridium IX, 10 mm Thread, 0.749 in Reach, Gasket Seat, Stock Number 3521, Resistor, Each
Item #: NGKCR9EIX
Condition: New
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Price: $11.99
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Description: Spark Plug, NGK Iridium IX, 10 mm Thread, 0.749 in Reach, Gasket Seat, Stock Number 6216, Resistor, Each
Item #: NGKCR8EHIX-9
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Description: Spark Plug, NGK Iridium IX, 10 mm Thread, 0.749 in Reach, Gasket Seat, Stock Number 9198, Resistor, Each
Item #: NGKCPR7EAIX-9
Condition: New
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Description: Spark Plug, NGK Iridium IX, 12 mm Thread, 0.749 in Reach, Gasket Seat, Stock Number 6546, Resistor, Each
Item #: NGKDCPR8EIX
Condition: New
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Description: Spark Plug, NGK Iridium IX, 14 mm Thread, 0.5000 in Reach, Gasket Seat, Stock Number 7001, Resistor, Each
Item #: NGKBR8HIX
Condition: New
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Description: Spark Plug, NGK Iridium IX, 14 mm Thread, 0.749 in Reach, Gasket Seat, Stock Number 2115, Resistor, Each
Item #: NGKBPR5EIX-11
Condition: New
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Description: Spark Plug, NGK Iridium IX, 14 mm Thread, 0.749 in Reach, Gasket Seat, Stock Number 2707, Resistor, Each
Item #: NGKBR9ECMIX
Condition: New
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Price: $17.99
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Description: Spark Plug, NGK Iridium IX, 14 mm Thread, 0.749 in Reach, Gasket Seat, Stock Number 6341, Resistor, Each
Item #: NGKBKR5EIX
Condition: New
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Description: Spark Plug, NGK Iridium IX, 14 mm Thread, 0.749 in Reach, Gasket Seat, Stock Number 6664, Resistor, Each
Item #: NGKBR7EIX
Condition: New
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Description: Spark Plug, NGK Iridium IX, 14 mm Thread, 0.749 in Reach, Gasket Seat, Stock Number 6684, Resistor, Each
Item #: NGKBPR8EIX
Condition: New
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Description: Spark Plug, NGK Iridium IX, 14 mm Thread, 26.5 mm Reach, Gasket Seat, Stock Number 4469, Resistor, Each
Item #: NGKLFR5AIX-11
Condition: New
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Description: Spark Plug, NGK Iridium IX, 14 mm Thread, 26.5 mm Reach, Gasket Seat, Stock Number 6619, Resistor, Each
Item #: NGKLFR6AIX-11
Condition: New
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Description: Spark Plug, NGK Iridium IX, 14 mm Thread, 0.460 in Reach, Tapered Seat, Stock Number 7401, Resistor, Each
Item #: NGKUR4IX
Condition: New
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Price: $13.99
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Description: Spark Plug, NGK Iridium IX, 12 mm Thread, 26.5 mm Reach, Tapered Seat, Stock Number 7554, Resistor, Each
Item #: NGKZNAR7AIX
Condition: New
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Description: Spark Plug, NGK Laser Iridium IX, 12 mm Thread, 0.749 in Reach, Gasket Seat, Stock Number 5686, Resistor, Each
Item #: NGKDR7EIX
Condition: New
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Description: Spark Plug, NGK Laser Iridium IX, 12 mm Thread, 0.749 in Reach, Gasket Seat, Stock Number 6681, Resistor, Each
Item #: NGKDR8EIX
Condition: New
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Description: Spark Plug, NGK Laser Iridium IX, 14 mm Thread, 26.5 mm Reach, Gasket Seat, Stock Number 2309, Resistor, Each
Item #: NGKLFR7AIX
Condition: New
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Description: Spark Plug, NGK Iridium IX, 14 mm Thread, 0.460 in Reach, Tapered Seat, Stock Number 7177, Resistor, Each
Item #: NGKUR5IX
Condition: New
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Price: $11.99
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Description: Spark Plug, NGK Iridium IX, 14 mm Thread, 0.460 in Reach, Tapered Seat, Stock Number 7384, Resistor, Each
Item #: NGKUR6IX
Condition: New
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Description: Spark Plug, NGK Iridium IX, 18 mm Thread, 0.370 in Reach, Tapered Seat, Stock Number 7510, Resistor, Each
Item #: NGKWR5IX
Condition: New
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Price: $12.99
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Description: Spark Plug, NGK Iridium IX, 14 mm Thread, 0.460 in Reach, Tapered Seat, Stock Number 7516, Resistor, Each
Item #: NGKYR5IX
Condition: New
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Description: Spark Plug, NGK Iridium IX, 10 mm Thread, 0.749 in Reach, Gasket Seat, Stock Number 4218, Resistor, Each
Item #: NGKCR8EIX
Condition: New
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Price: $10.99
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Description: Spark Plug, NGK Iridium IX, 12 mm Thread, 0.749 in Reach, Gasket Seat, Stock Number 2202, Resistor, Each
Item #: NGKDPR8EIX-9
Condition: New
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Price: $8.45
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Description: Spark Plug, NGK Iridium IX, 12 mm Thread, 0.749 in Reach, Gasket Seat, Stock Number 5545, Resistor, Each
Item #: NGKDPR9EIX-9
Condition: New
Limited Supply: Only 0 Left!
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Price: $13.99
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Description: Spark Plug, NGK Iridium IX, 14 mm Thread, 0.708 in Reach, Tapered Seat, Stock Number 3689, Resistor, Each
Item #: NGKTR6IX
Condition: New
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Price: $13.99
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Items 1-25 of 49

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More About NGK Iridium IX Spark Plugs

The improved throttle response, superior anti-fouling and high-ignitability makes NGK Iridium IX® Spark Plugs ideal for the performance enthusiast. Iridium’s extremely high melting point is perfectly suited to today’s high-temperature engines, delivering outstanding acceleration, fuel efficiency and durability.

Features:

  • Fine iridium tip ensures high durability and a consistently stable spark
  • Trivalent metal plating for superior anti-corrosion and anti-seizing properties
  • Outstanding acceleration, high fuel efficiency and durability