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12x NGK CR9EIX (3521) Iridium IX Spark Plugs View larger

12x NGK CR9EIX (3521) Iridium IX Spark Plugs

NGK_13 x 12

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The Spark Plug Serious Enthusiasts Rely On.

Iridium IX® offers extreme ignitability, improved throttle response and superior anti fouling:

  • Fine Iridium tip ensures high durability and a consistently stable spark

  • Iridium alloy has an extremely high melting point, perfect for today’s high-tech, high-performance engines

  • Trivalent Metal Plating - superior anti-corrosion and anti-seizing properties

  • Outstanding acceleration, high fuel efficiency and durability

  • Ultimate design, technology and performance.

  • Longer life

  • Improves idling & throttle response.

  • Better electrode anti-oxidation

  • Improved ignition

  • Better electrode anti-erosion

  • Allows the use of an extremely small diameter electrode (0.6mm) without compromising the spark plug's service life

  • Superior anti-fouling

  • Lower required voltage


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