Bosch 4312 SPARK PLUG

Bosch Platinum+2 Spark Plugs contain more platinum than Bosch Platinum Plus for smoother acceleration, better gas mileage and optimum engine performance. Platinum+2 uses surface air gap technology to deliver a longer, more powerful spark for optimum engine performance. The spark of a Platinum+2 first travels over the surface of the insulator nose and then arcs across the air gap to a ground electrode for a longer spark, without increasing the voltage requirement. Plus, the yttrium alloy ground electrodes help to reduce gap wear and oxidation, extending the service life of the spark plug