• Iridium-tipped spark plugs have been adopted on both trailing and leading sides to improve durability.
• A center electrode with a thick insulator and extremely thin tip (diameter of 0.8 mm {0.03 in}) and small single-ground electrode have been adopted to stabilize firing under a thin fuel-air mixture. At the same time, high-heat resistance has been improved by decreasing the temperature of the electrode and the insulator.
• Spark plugs with an internal resister have been adopted to remove noise caused by the ignition system. The effect of which prevents ignition noise from mixing with the audio system.
• White or yellow paint (leading side), blue or green paint (trailing side) is on the the spark plugs to prevent mis-installation. (Standard type spark plugs only.)
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1
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Paint location (standard type spark plugs only)
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2
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Ground electrode
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3
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0.8 mm {0.03 in}
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4
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Center electrode (irdium)
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