Why NGK Iridium? More durability and a higher melting point compared to platinum, better center electrode anti-oxidation and anti-erosion, improved ignition, superior anti-fouling, lower required voltage, and a new metal shell plating process for better anti-corrosion. One Step Colder plugs are recommended for cars with heavy modifications. These NGK plugs will get running smoother with more power through increased efficiency and heat resistance.
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