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• Four yttrium enhanced ground electrodes resist spark plug wear and oxidation for exceptional performance life
• 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

• 0.6mm ultra fine wire iridium center electrode provides exceptional ignitability
• Bosch EXCLUSIVE tapered laser-welded platinum ground electrode provides more area for flame growth and increased durability
• Nickel plated housing provides superior resistance to corrosion and seizing

• Electrode gap is factory set to provide ease of installation - never requires adjustment
• Revolutionary surface air gap firing technology featuring four yttrium-enhanced ground electrodes delivers the longest, most powerful spark for ultimate engine performance
• Provides ease of installation - never requires adjustment

• Fine platinum tip reduces required voltage
• Extremely durable under high heat
• Features superior anti-corrosion and anti-seizing properties

• Near elimination of performance inhibiting carbon deposits, dramatically longer plug life and a 5-year/100,000 mile limited warranty
• Significant potential power increase: > 6% to 12% (depending on engine class)
• Drastic potential emissions reduction when used in 2 and 4-stroke engines (after 50 hours): 58% CO emissions reduction, 42% hydrocarbon reduction