This is a heavy-duty nickel-copper spark plug with a yttrium-enhanced electrode for ~50% longer lifespan compared to standard copper alternatives. Features a 4-pin connector, M14×1.25 thread, 26.5 mm thread length, 16 mm hex, 3–5 mm spark gap and pre-set 1.6 mm electrode gap—optimized for OE performance and reliable ignition
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