• NGK single iridium spark plug box of 4, automotive spark plugs with TR8IX model, shown with packaging and plugs visible.
  • NGK single iridium spark plugs in a box of four, showing the TR8IX model with metal tips and packaging.
NGK single iridium spark plug box of 4, automotive spark plugs with TR8IX model, shown with packaging and plugs visible.
NGK single iridium spark plugs in a box of four, showing the TR8IX model with metal tips and packaging.
NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode's durability is six times harder than platinum. Iridium alloy's extremely high melting point is perfect for today's engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug.

NGK

NGK Single Iridium Spark Plug Box of 4 (TR8IX)

SKU NGK3691
$37.60
NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode's durability is six times harder than platinum. Iridium alloy's extremely high melting point is perfect for today's engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug.
$37.60

NGK single iridium spark plug box of 4, automotive spark plugs with TR8IX model, shown with packaging and plugs visible. NGK single iridium spark plugs in a box of four, showing the TR8IX model with metal tips and packaging.
NGK single iridium spark plug box of 4, automotive spark plugs with TR8IX model, shown with packaging and plugs visible. NGK single iridium spark plugs in a box of four, showing the TR8IX model with metal tips and packaging.

NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode's durability is six times harder than platinum. Iridium alloy's extremely high melting point is perfect for today's engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug.

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