Equipped with iridium firing pins at the center and ground electrode: Bosch Double-Iridium spark plugs are developed to the same high quality as original equipment and engineered for high performance in gasoline engines. Since 1902, Bosch has continuously been driving further development of spark plug technologies. Cooperations with motorsport teams and vehicle manufacturers bring out innovations which are also implemented at Bosch spark plug product development and production procedures on an ongoing basis.