The Bosch Platinum IR Fusion Spark Plug features an iridium and platinum fused center electrode with surface air-gap firing to deliver optimum horsepower. Product Features:A fused iridium and platinum center electrode, sintered into an extended insulator nose, reaches self-cleaning temperature only seconds after starting and provides exceptional wear resistanceRevolutionary surface air gap firing technology featuring Bosch's unique 4 ground electrode design delivers a powerful spark for efficient combustion and optimum horsepower without increasing the voltage requirement4 yttrium-enhanced ground electrodes resist spark plug wear and oxidation for exceptional performance lifeFactory pre-set gap never requires adjustment to promote easy installation
