Bosch Platinum 2 Spark Plug: * Smoother acceleration * Better gas mileage * Optimum engine performance * Uses surface air gap technology * Spark first travels over the surface of the insulator nose and then arcs across the air gap to a ground electrode for a longer spark * Does not increase the voltage requirement * More platinum in the center electrode * 2 yttrium alloy ground electrodes help to reduce gap wear and oxidation, extending the service life of the spark plug