Bosch Fusion Spark Plugs, 4515

Bosch Fusion spark plugs provide 3.5 times longer service life verses standard copper core plugs. It delivers optimum horsepower and exceptional performance by combining a fused iridium/platinum center electrode with four yttrium-enhanced ground electrodes with revolutionary surface air gap firing technology for a longer more powerful spark.

Bosch Fusion Spark Plugs, 4515: Fused iridium and platinum center electrode Centered into an extended insulator nose reaches self-cleaning temperature only seconds after starting Improved resistance to fouling, reliable starts Provides exceptional wear resistance to meet OE specifications for long life iridium spark plugs Revolutionary surface air gap firing technology Bosch's unique 4-ground electrode design that delivers the most powerful spark for the most efficient combustion and optimum horsepower without increasing the voltage requirement 4 yttrium-enhanced ground electrodes resists spark plug wear and oxidation for exceptional performance life Factory pre-set gaps provide ease of installation which never requires adjustment