The Bosch Platinum+4 spark plug features unique revolutionary firing technology that combines the advantages of surface air gap technology, 4 nickel-yttrium ground electrodes and a heat-fused center electrode with pure platinum to provide optimum engine performance, smoother acceleration and top fuel efficiency. Product Features:Revolutionary surface air gap firing technology, featuring multiple spark paths, delivers a powerful spark for ultimate engine performanceOffers smoother acceleration, top fuel economy and maximum engine power4 yttrium-enhanced ground electrodes provide optimum access to the air/fuel mixture for the most efficient combustion; yttrium alloy ground electrodes reduce gap wear and oxidation for extended performance life
