Finding the best e3 harley spark plugs suitable for your needs isnt easy. With hundreds of choices can distract you. Knowing whats bad and whats good can be something of a minefield. In this article, weve done the hard work for you.

Finding the best e3 harley spark plugs suitable for your needs isnt easy. With hundreds of choices can distract you. Knowing whats bad and whats good can be something of a minefield. In this article, weve done the hard work for you.

Best e3 harley spark plugs

Product Features Editor's score Go to site
E3 Spark Plug E3.36 Powersports Spark Plug, Pack of 1 E3 Spark Plug E3.36 Powersports Spark Plug, Pack of 1
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E3 Spark Plug E3.34 Powersports Spark Plug, Pack of 1 E3 Spark Plug E3.34 Powersports Spark Plug, Pack of 1
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NGK Iridium IX DCPR7EIX Spark Plugs for 1999-2016 Harley Davidson Twin Cam (Pair) NGK Iridium IX DCPR7EIX Spark Plugs for 1999-2016 Harley Davidson Twin Cam (Pair)
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NGK Iridium IX DCPR7EIX Spark Plugs for 1986-2016 Harley Davidson Sportster XL (Pair) NGK Iridium IX DCPR7EIX Spark Plugs for 1986-2016 Harley Davidson Sportster XL (Pair)
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E3 Spark Plug E3.38 Powersports Spark Plug, Pack of 1 E3 Spark Plug E3.38 Powersports Spark Plug, Pack of 1
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Iridium Performance Spark Plugs Pair for Harley Softail Slim Twin Cam repl. Harley# 6R12 Iridium Performance Spark Plugs Pair for Harley Softail Slim Twin Cam repl. Harley# 6R12
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E3 Spark Plug E3.42 Automotive Spark Plug, Pack of 1 E3 Spark Plug E3.42 Automotive Spark Plug, Pack of 1
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E3 Spark Plug E3.32 Powersports Spark Plug, Pack of 1 E3 Spark Plug E3.32 Powersports Spark Plug, Pack of 1
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E3 Spark Plugs E3.33 Premium Powersport Spark Plug, Pack of 1 E3 Spark Plugs E3.33 Premium Powersport Spark Plug, Pack of 1
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E3 Spark Plug E3.12 Lawn and Garden Spark Plug, Pack of 1 E3 Spark Plug E3.12 Lawn and Garden Spark Plug, Pack of 1
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1. E3 Spark Plug E3.36 Powersports Spark Plug, Pack of 1

Feature

Near elimination of performance inhibiting carbon deposits, dramatically longer plug life and limited warranty
DiamondFire electrode technology that creates a superior spark and resulting flame front extending further into the cylinder, producing more localized pressure
Significant potential power increase: > 6% to 12% (depending on engine class)
Significant potential fuel efficiency improvement: > 4% to 13% (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

Description

E3 has taken the best features from traditional spark plugs, such as cut-back ground electrodes and surface gaps, and combined them to create a new ground electrode design. Surface gap plugs present the flame kernel to the piston (or rotor) more directly, reducing the travel time from the spark to the combustion gases (although this difference is only measurable in hundred-thousands of a second, at 5000 RPM, they can add up). This avoids the "doughnut" shaped flame front created by standard spark plug electrodes. This is achieved in the E3 design through the open section at the top of the ground electrode. E3 spark plugs combine the benefits of additional sharp electrode edges with a cut-back electrode design used on some racing spark plugs. The increase of available edge-to-edge surface area encourages a more rapid spark discharge while also reducing quenching and shadowing. The two legs that support the special geometry of E3's powersports plug ground electrode aid in heat dissipation for longer electrode life. The center electrode on E3 spark plugs is created from nickel alloy with a copper center core for both improved conductivity as well as heat dissipation.

2. E3 Spark Plug E3.34 Powersports Spark Plug, Pack of 1

Feature

Near elimination of performance inhibiting carbon deposits, dramatically longer plug life and limited warranty
DiamondFire electrode technology that creates a superior spark and resulting flame front extending further into the cylinder, producing more localized pressure
Significant potential power increase: > 6% to 12% (depending on engine class)
Significant potential fuel efficiency improvement: > 4% to 13% (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

Description

E3 has taken the best features from traditional spark plugs, such as cut-back ground electrodes and surface gaps, and combined them to create a new ground electrode design. Surface gap plugs present the flame kernel to the piston (or rotor) more directly, reducing the travel time from the spark to the combustion gases (although this difference is only measurable in hundred-thousands of a second, at 5000 RPM, they can add up). This avoids the "doughnut" shaped flame front created by standard spark plug electrodes. This is achieved in the E3 design through the open section at the top of the ground electrode. E3 spark plugs combine the benefits of additional sharp electrode edges with a cut-back electrode design used on some racing spark plugs. The increase of available edge-to-edge surface area encourages a more rapid spark discharge while also reducing quenching and shadowing. The two legs that support the special geometryof E3's powersports plug ground electrode aid in heat dissipation for longer electrode life. The center electrode on E3 spark plugs is created from nickel alloy with a copper center core for both improved conductivity as well as heat dissipation.

3. NGK Iridium IX DCPR7EIX Spark Plugs for 1999-2016 Harley Davidson Twin Cam (Pair)

Feature

Come pre-gapped
The iridium electrode is 25% smaller than a platinum electrode, and it's just 1/4 the size of a conventional nickel electrode
Ultra-small diameter center electrode reduces voltage requirement and extends ignition system life
The ultimate in spark plug technology and performance from the industry leader
New metal shell plating has enhanced anti corrosion qualities

Description

Gain up to 3HP just by using these plugs! The ultimate in spark plug technology and performance from the industry leader The iridium electrode is 25% smaller than a platinum electrode, and it's just 1/4 the size of a conventional nickel electrode Ultra-small diameter center electrode reduces voltage requirement and extends ignition system life New metal shell plating has enhanced anticorrosion qualities Come pre-gapped

4. NGK Iridium IX DCPR7EIX Spark Plugs for 1986-2016 Harley Davidson Sportster XL (Pair)

Feature

Come pre-gapped
The iridium electrode is 25% smaller than a platinum electrode, and it's just 1/4 the size of a conventional nickel electrode
Ultra-small diameter center electrode reduces voltage requirement and extends ignition system life
The ultimate in spark plug technology and performance from the industry leader
New metal shell plating has enhanced anti corrosion qualities

Description

Gain up to 3HP just by using these plugs! The ultimate in spark plug technology and performance from the industry leader The iridium electrode is 25% smaller than a platinum electrode, and it's just 1/4 the size of a conventional nickel electrode Ultra-small diameter center electrode reduces voltage requirement and extends ignition system life New metal shell plating has enhanced anticorrosion qualities Come pre-gapped

5. E3 Spark Plug E3.38 Powersports Spark Plug, Pack of 1

Feature

Near elimination of performance inhibiting carbon deposits, dramatically longer plug life and limited warranty
DiamondFire electrode technology that creates a superior spark and resulting flame front extending further into the cylinder, producing more localized pressure
Significant potential power increase: > 6% to 12% (depending on engine class)
Significant potential fuel efficiency improvement: > 4% to 13% (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

Description

E3 has taken the best features from traditional spark plugs, such as cut-back ground electrodes and surface gaps, and combined them to create a new ground electrode design. Surface gap plugs present the flame kernel to the piston (or rotor) more directly, reducing the travel time from the spark to the combustion gases (although this difference is only measurable in hundred-thousands of a second, at 5000 RPM, they can add up). This avoids the "doughnut" shaped flame front created by standard spark plug electrodes. This is achieved in the E3 design through the open section at the top of the ground electrode. E3 spark plugs combine the benefits of additional sharp electrode edges with a cut-back electrode design used on some racing spark plugs. The increase of available edge-to-edge surface area encourages a more rapid spark discharge while also reducing quenching and shadowing. The two legs that support the special geometryof E3's powersports plug ground electrode aid in heat dissipation for longer electrode life. The center electrode on E3 spark plugs is created from nickel alloy with a copper center core for both improved conductivity as well as heat dissipation.

6. Iridium Performance Spark Plugs Pair for Harley Softail Slim Twin Cam repl. Harley# 6R12

Feature

The ultimate in spark plug technology and performance
Iridium electrode is smaller than a standard electrode; requires less voltage
Hotter spark and extended spark plug service life compared to conventional plugs
Has the distinctive black ceramic with and gold-colored corrosion-protected coating on the metal shell
Sold in pairs and replaces Harley# 6R12 / NGK# DCPR7EIX

Description

  • The ultimate in spark plug technology and performance
  • Iridium electrode is smaller than a standard electrode; requires less voltage
  • Hotter spark and extended spark plug service life compared to conventional plugs
  • Has the distinctive black ceramic with and gold-colored corrosion-protected coating on the metal shell
  • Sold in pairs
  • Replaces Harley# 6R12 / NGK# DCPR7EIX
  • (2) Spark plugs Resister type

    5/8" Hex

    11/16" Thread reach / 12mm Thread diameter

    Projecting insulator type / Removable terminal nut

    7. E3 Spark Plug E3.42 Automotive Spark Plug, Pack of 1

    Feature

    Near elimination of performance inhibiting carbon deposits, dramatically longer plug life and a 5-year/100, 000 mile limited
    Diamond fire electrode technology that creates a superior spark and resulting flame front extending further into the cylinder, producing more localized pressure
    Significant potential power increase: > 6% to 12% (depending on engine class)

    Description

    The exceptional performance of the E3 spark plug starts with the unique open architecture of the E3 electrode. The design forces air gap discharges, creates the preferred edge-to-edge spark path, allows free replenishment of the spark zone with a fresh fuel/air charge, and exposes the flame front more directly to the piston head than other plug designs. Sparks naturally follow edge-paths as they leave an object. The E3 design presents multiple sharp edges to the center electrode. Sparks flow between these edges at lower voltages, facilitating easier discharge than standard designs. By forcing air sparks, the resistance to fouling is greatly increased in the E3 spark plug. This lowers the self-cleaning temperature of the spark plug, allowing colder heat ranges to be used if desired. E3's distinctive spark plug design has proven, in testing in a range of engines, to simultaneously increase engine power output, reduce gasoline consumption, decrease hydrocarbon and carbon monoxide emissions from the engine and materially extend the life of the spark plug.

    8. E3 Spark Plug E3.32 Powersports Spark Plug, Pack of 1

    Feature

    Near elimination of performance inhibiting carbon deposits, dramatically longer plug life and limited warranty
    DiamondFire electrode technology that creates a superior spark and resulting flame front extending further into the cylinder, producing more localized pressure
    Significant potential power increase: > 6% to 12% (depending on engine class)
    Significant potential fuel efficiency improvement: > 4% to 13% (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

    Description

    E3 has taken the best features from traditional spark plugs, such as cut-back ground electrodes and surface gaps, and combined them to create a new ground electrode design. Surface gap plugs present the flame kernel to the piston (or rotor) more directly, reducing the travel time from the spark to the combustion gases (although this difference is only measurable in hundred-thousands of a second, at 5000 RPM, they can add up). This avoids the "doughnut" shaped flame front created by standard spark plug electrodes. This is achieved in the E3 design through the open section at the top of the ground electrode. E3 spark plugs combine the benefits of additional sharp electrode edges with a cut-back electrode design used on some racing spark plugs. The increase of available edge-to-edge surface area encourages a more rapid spark discharge while also reducing quenching and shadowing. The two legs that support the special geometryof E3's powersports plug ground electrode aid in heat dissipation for longer electrode life. The center electrode on E3 spark plugs is created from nickel alloy with a copper center core for both improved conductivity as well as heat dissipation.

    9. E3 Spark Plugs E3.33 Premium Powersport Spark Plug, Pack of 1

    Feature

    E3's Diamond FIRE edge to edge electrode provides maximum performance with increased efficiency, and a faster more complete burn
    Quicker Starts - The patented Edge to Edge design concentrates spark energy resulting in easy starts in all conditions
    Energy - Increases both two and four cycle engine power up to 12% over conventional spark plugs
    Efficiency - Fuel consumption reduced up to 13% in small engines
    Ecology - E3's advanced spark technology produces cleaner burning combustion; toxic emissions in long term use reduced up to 58%

    Description

    E3.33 is a 14mm, 0.750" reach plug with a gasket seat. It is used in a variety of powersport applications, especially the Honda Goldwing. The patented Diamond FIRE ground electrode is secured to the shell with two legs to help facilitate heat transfer, and to withstand the intense vibration of powersport engine applications. The unique Diamond FIRE side wire is proven to increase power, reduce fuel consumption and improve hydrocarbon emissions in long-term use. The E3 ground electrode and full-size center electrode also provides optimal performance over an extended product life.

    10. E3 Spark Plug E3.12 Lawn and Garden Spark Plug, Pack of 1

    Feature

    Near elimination of performance inhibiting carbon deposits, dramatically longer plug life and limited warranty for the lifetime of the first engine the plug is installed in
    DiamondFire electrode technology that creates a superior spark and resulting flame front extending further into the cylinder, producing more localized pressure
    Significant potential power increase: > 6% to 12% (depending on engine class)
    Significant potential fuel efficiency improvement: > 4% to 13% (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

    Description

    E3 Lawn & Garden Spark Plugs with DiamondFIRE Technology generates more power on less fuel, while dramatically reducing hydrocarbon emissions. E3 L&G spark plugs have a limited lifetime guarantee.

    Conclusion

    All above are our suggestions for e3 harley spark plugs. This might not suit you, so we prefer that you read all detail information also customer reviews to choose yours. Please also help to share your experience when using e3 harley spark plugs with us by comment in this post. Thank you!