With DiamondFIRE Technology, there’s power behind every plug. | E3 Spark Plugs
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With DiamondFIRE Technology, there’s power behind every plug. | …
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It’s not magic. It’s engineering, and it makes more power. Every DiamondFire plug starts with geometry that matters. That diamond-shaped tip isn’t for looks, it reshapes the spark, broadens the flame, and delivers real performance gains. Precision built and proven on the track. | E3 Spark Plugs
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