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• 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
• Factory pre-set gap allows for easy installation that never requires adjustment
• 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

• Significant potential power increase: > 6% to 12% (depending on engine class)
• Significant potential fuel efficiency improvement: > 4% to 13% (depending on engine class)
• Near elimination of performance inhibiting carbon deposits, dramatically longer plug life and a 5-year/100,000 mile limited warranty

• Diagonal 0.8mm Platinum Ground Electrode
• 0.4mm Iridium Center Electrode
• Denso # 5729

• 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
• 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
• Factory pre-set gap allows for easy installation that never requires adjustment

• Stable combustion during idling
• Low fuel consumption
• Excellent acceleration and performance