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| Bosch Platinum+4 spark plugs contain the most platinum in their Platinum series for smoother acceleration, top fuel economy and maximum engine power. If you require the best in platinum performance over the longest service life, Platinum+4 is the spark plug for you. Platinum+4 features revolutionary surface air gap firing technology, delivering the longest, most powerful spark for ultimate engine performance. Four yttrium-enhanced ground electrodes provide optimum access to the air/fuel mixture for the most efficient combustion, plus the yttrium alloy ground electrodes reduce gap wear and oxidation for extended performance life. Factory set electrode gap provides ease of installation and never requires adjustment. |
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