Swap in E3 Spark Plugs and the difference hits fast. Strong spark, clean burn, and throttle response that feels tighter every time you step into it. DiamondFire gives the ignition the consistency the motor’s been missing. | E3 Spark Plugs
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Power starts with precision. Every build needs dependable ignition, and E3 Spark Plugs deliver it. Reliable, consistent, and built to perform no matter what you’re working on next. | E3 Spark Plugs
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We are always for better ways to make reliable horsepower. Having heard good things about E3 Spark Plugs, we decided to try them out in one of our supercharged LS street engines. Final dyno pull - 1,292 hp ( 12 hp). Sweet! | Borowski Race Engines
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We are always for better ways to make reliable horsepower. Having …
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With DiamondFIRE Technology, there’s power behind every plug. | E3 Spark Plugs
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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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