Automotive Parts and Accessories

Top 10 Best Spark Plugs For Harley Based On User Rating

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Do you ever struggle to find the Spark Plugs For Harley to buy? If so, we have good news! Not only have we compiled a list of the 10 Best Spark Plugs For Harley on the market today, but we’ve also included a little bit of information about why we love each one. Keep reading to learn more about these great products and why they made our list.

We love each of these products because they’re all high-quality items that will last a long time. Whether it’s the perfect gift or something you need for yourself, there’s something for everyone on here!

Our in-depth product reviews always take that extra step, so that our users can be sure to only find the best, most reliable products. If you're curious to know more about any of these items, keep reading for all the info you need on each one.

Best Spark Plugs For Harley
Disclaimer: As An Amazon Associate I Earn From Qualifying Purchases.
NoProductScoreAction
1NGK Iridium IX DCPR7EIX Spark Plugs for 1999-2016 Harley Davidson Twin Cam (Pair)9.8Buy on Amazon
2NGK 6046 DCPR7EIX Spark Plug (Pack of 2)9.6Buy on Amazon
3E3 Spark Plugs E3.36 Powersports Spark Plug9.2Buy on Amazon
4E3 Spark Plugs E3.34 Powersports Spark Plug9.2Buy on Amazon
5Harley Electra Glide Classic Performance Spark Plugs Pair repl. OEM# 6R129Buy on Amazon
6TONRYCUE Spark Plug Wires for Harley Davidson Big Twin 1999-2019 FXD Dyna FXDWG Softail9Buy on Amazon
7NGK # 6046 Iridium Spark Plugs -- DCPR7EIX -- for Harley-Davidson Twin Cam and XL --- 4 PCS NEW9Buy on Amazon
8Champion Copper Plus 404 Spark Plug (Carton of 1) - RN12YC8.8Buy on Amazon
9Iridium Performance Spark Plugs Pair for Harley Softail Slim Twin Cam repl. Harley# 6R128.6Buy on Amazon
10Aokus 10.4mm 10mm Spark Plug Wire Compatible with Harley Davidson Big Twin 99-19 FXD Dyna Softail (Red)8.6Buy on Amazon

Comparison Chart for Best Spark Plugs For Harley

Our team scanned 62180 reviews before putting any suggestions for the Spark Plugs For Harley in this article.

Table Of Content:

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

  • 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

2. NGK 6046 DCPR7EIX Spark Plug (Pack of 2)

  • Quality Assured

3. E3 Spark Plugs E3.36 Powersports Spark Plug

  • Fit Type: Universal Fit
  • The Patented Diamondfire 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.
  • Improved Starts: Patented Edge-To-Edge Design Concentrates Spark Energy, Which Results In Quick And Easy Starts In Any Conditions.
  • For High-Performance Engines: Motorcycle Spark Plug For A Variety Of Powersport Applications, Specifically Designed To Increase Power, Reduce Fuel Consumption, And Improve Hydrocarbon Emissions.

4. E3 Spark Plugs E3.34 Powersports Spark Plug

  • FOR HIGH-PERFORMANCE ENGINES: Motorcycle spark plug for a variety of powersport applications, specifically designed to increase power, reduce fuel consumption, and improve hydrocarbon emissions.
  • PATENTED TECHNOLOGY: DiamondFIRE ground electrode is secured to the shell with 2 legs that help facilitate optimal heat transfer and withstand the intense vibration of powersport engine applications.
  • IMPROVED STARTS: Patented Edge-to-Edge design concentrates spark energy, which results in quick and easy starts in any conditions.
  • WHAT’S INCLUDED: One (1) E3.
  • REPLACES: Champion RN9YC, RN11YC, and RN12YC; NGK BPR5ES, BPR6ES, BPR7ES, and BR5ES
  • Fit type: Universal Fit

5. Harley Electra Glide Classic Performance Spark Plugs Pair repl. OEM# 6R12

  • Conventional style spark plugs, available in OEM heat ranges
  • Plugs have a unique look with a black ceramic body
  • Insulator is made of 95% pure alumina, features strong resistance to heat shock and superior insulation.
  • Sold in Pairs
  • Harley Electra Glide Classic

6. TONRYCUE Spark Plug Wires for Harley Davidson Big Twin 1999-2019 FXD Dyna FXDWG Softail

  • Fitment: for Harley Davidson Big Twin 1999-2019 FXD Dyna Softail
  • Material: Made of high quality rubber material, Constructed with silicone throught the jacket, insulation and core to deliver high-temperature resistance.
  • Rated Temperature: Rated at SAE Class E J2031 with a continuous operating temperature of 450° F
  • Package Included: 1 * spark plug wires

7. NGK # 6046 Iridium Spark Plugs — DCPR7EIX — for Harley-Davidson Twin Cam and XL — 4 PCS NEW

  • NGK 6046 now s/s to NGK 97637
  • NGK 97637 DCPR7EIX is the Newest Number
  • NGK is the world’s largest supplier of OEM spark plugs
  • Often specified as original equipment, NGK spark plugs are the best combination of performance and longevity.
  • This Listing is for 4 Spark Plugs

8. Champion Copper Plus 404 Spark Plug (Carton of 1) – RN12YC

  • Copper Plus – Dependable Performance and Durability
  • Copper core center electrode allows for accurate control of heat range for longer life
  • Superior corrosion resistance
  • Built to ISO and SAE standards for proven performance
  • Durable: Champion copper plus spark plugs are built to ISO and SAE standards for proven performance; Champion’s patented SAC-9 semi-conductor resistor provides maximum EMI and RFI suppression.
  • Champion copper plus spark plugs use TinTac and Ultraseal Shells, this eliminates the need for the use of anti-seize compound during installation by providing the best corrosion protection of any spark plug in the industry.
  • The Champion copper plus spark plug features a copper core electrode that provides increased conductivity and heat control while delivering good overall wear characteristics.
  • Provides longer life; Copper core center electrode allows for accurate control of the plug’s heat range, optimizing the plug’s performance and adding to the longevity of the spark plug.

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

  • 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

10. Aokus 10.4mm 10mm Spark Plug Wire Compatible with Harley Davidson Big Twin 99-19 FXD Dyna Softail (Red)

  • Replace for Manufacturer Part Number: DYNA-409RD
  • Fits for virtually like factory location on cylinder Harley-Davidson or Big-Twin that has the coil mounted on the seat post.
  • Great for replacement wire, relocation kits, new look, bobbers, scramblers, cafe racer etc
  • Perfect Fitment, directly replacement. Made of high quality material, reliable quality and durable.
  • Package includes: 2 * Red Spark Plug Wires (one 8″ and one 20″ long wires pre-crimped)

Some Factors to Consider for Choosing the Spark Plugs For Harley


When it comes to finding the perfect product, the process can be daunting. You may feel like you're juggling between choices: which model to choose, what features are important to you, what's the best price? But don't worry, by focusing on these factors you can select a quality product from hundreds of options. Let’s start below:

Understand Your Needs


Think carefully about your needs before making any decisions. If you're not sure what you need, you could end up investing in the wrong products and wasting your money. Make a list of your requirements to help you narrow down your options and make more informed choices. This will help you stay within your budget and make sure you're getting what you really need.

Product Brand:


Because we are emotionally attached to certain brands, we may be biased in our decision-making. This can sometimes yield positive results, but it can also have negative consequences. However, there is no denying the convenience of relying on well-known brands. Having enough money to make choices easy is often half the battle. But please note that not all brands are necessary for an adequate product. That's why you have to be careful about choosing the right product from the right brand.

Budget vs. Cost:


When deciding whether or not to buy something, one of the most important things to consider is your budget. The price of a product can vary depending on factors like raw materials, manufacturing costs, logistics and other operational costs. If you need a higher quality product, you should be prepared to spend more money. This is why budget is so important.

Quality and Longevity:

Warranty and Return Policy: Many manufacturers are making high-quality products and letting us know about them through creative advertisements. However, the matter of warranty and after-sales service is often overlooked and can make a big difference.

FAQs and Customer:


Checking FAQ answers and customer reviews can save you time. Frequently asked questions (FAQs) can provide answers to questions you have, and customer reviews can give you insights into other people's experiences with a product. Reading both before making a purchase can help you make a more informed decision.

Final Thought


In the end, this is to consider that the price you are paying is rational enough with the value the Spark Plugs For Harley is providing. Does it make you happy or not? Does your desires be full filled with that? That’s the thing that should get the most importance we guess.

Hope you have enjoyed this whole article which was actually a buying guide that will lead you to buy the Best Spark Plugs For Harley. Nobody can be more happy than us if you find this a little of helpful to you. At the end of the day, your satisfaction matters most to us.

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