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• Factory pre-set gap allows for easy installation that never requires adjustment
• Fused iridium and platinum center electrode, sintered into an extended insulator nose results in reaching self-cleaning temperature only seconds after starting and provides exceptional wear resistance
• Revolutionary surface air gap firing technology featuring Bosch's unique four ground electrode design delivers the most powerful spark for the most efficient combustion and optimum horsepower without increasing the voltage requirement

• Stable combustion during idling
• Excellent acceleration and performance
• Long life and high reliability

• Lower required voltage
• You can depend on NGK for quality and reliability
• More durability and a higher melting point than platinum

• Revolutionary surface air gap firing technology featuring Bosch's unique four ground electrode design delivers the most powerful spark for the most efficient combustion and optimum horsepower without increasing the voltage requirement
• Four yttrium enhanced ground electrodes resist spark plug wear and oxidation for exceptional performance life
• Factory pre-set gap allows for easy installation that never requires adjustment

• Includes laser welded platinum tip on center electrode and platinum tip on the ground electrode
• Taper cut reduces the voltage necessary and provides better throttle response
• You can depend on NGK for quality and reliability