4-piece Set High Performance Spark Plug Iridium Platinum/Double Iridium Optional Extends Engine Life

This set of four high-performance spark plugs uses iridium-platinum or dual iridium electrodes, more heat-resistant and anti-erosion than standard nickel alloy, tested lifespan 80,000–100,000 km, significantly extending ignition system life. Although no OEM number, part number is listed as “All Models,” compatible with most gasoline engines on the market, including Japanese, German, American brands. Function: provide steadier spark discharge to improve combustion, reduce carbon buildup and jitter, especially suitable for high compression or turbocharged engines. Installation difficulty is medium to easy; with a spark plug socket and torque wrench, tighten after setting the original gap. Cold-engine operation recommended to avoid cylinder head thread damage.