Double Iridium electrodes - iridium firing pin and iridium ground electrode inlay - offer higher performance OE-matched spark position for compatibility with Gasoline Direct Injection (GDI) technology Nickel-plated rolled threads provide superior resistance to corrosion and do not require anti-seize for installation Bosch Double Iridium spark plugs are pre-gapped at the factory and do not require a gap adjustment prior to installation Meets or exceeds manufacturer design requirements for modern gasoline engines to provide OE fit, form and function, while delivering 4X longer service life when compared to standard copper spark plugs
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