Bosch Auto FR8DS Bosch Silver Spark Plug

The center electrode tip is made from a silver alloy, ensuring long service life and ignition sparks with increased energy. Highly resistant to material erosion. Improved spark plug efficiency. Ribbed insulator design prevents misfires due to flash-over. Nickel-plated rolled threads is used for complete anti-seize and corrosion protection. Bosch Silver Spark Plugs are engineered for older European performance cars, as well as some motorcycle applications. These types of vehicle engines operate at particularly high combustion chamber temperatures, increasing the wear on the electrodes. Bosch uses silver alloys in the center electrode tip to resist wear and improve spark plug efficiency.