Best Spark Plugs For Harley for 2023: Top 20 Picks

Sometimes it might be quite difficult to find the best spark plugs for harley. With every niche market offering so many different products, it makes sense that this is the case.

Unfortunately, this very fact can make it incredibly difficult to find the item that best suits your needs, which is why we’ve put together this spark plugs for harley buying guide.

Our Top 20 Picks:

#	Preview	Product
1		NGK Iridium IX DCPR7EIX Spark Plugs for 1999-2016 Harley Davidson Twin Cam (Pair)	Check Price
2		NGK 6046 DCPR7EIX Spark Plug (Pack of 2)	Check Price
3		E3 Spark Plugs E3.36 Powersports Spark Plug, Pack of 1	Check Price
4		NGK 3932 Standard Spark Plug - DCPR7E, 1 Pack	Check Price
5		2Pcs CNPAPC Upgrade Double Iridium IX Spark Plugs DCPR7EIX #3144 #6046 #97637 for 1999-2016 Harley...	Check Price
6		NGK Iridium IX BKR5EIX-11 Spark Plugs for 1984-2000 Harley Davidson Big Twin (Pair)	Check Price
7		Iridium Performance Spark Plugs Pair for Harley Softail Slim Twin Cam repl. Harley# 6R12	Check Price
8		NGK 7634 Spark Plug, black	Check Price
9		TONRYCUE 10.4mm 10mm Spark Plug Wire Compatible with Harley Davidson Big Twin 1999-2019, and for FXD...	Check Price
10		Sportster Sport XL 1200S Performance Spark Plugs Pair repl. OEM# 6R12	Check Price
11		NGK 3932 DCPR7E Standard Spark Plug	Check Price
12		E3 Spark Plugs E3.34 Powersports Spark Plug, Pack of 1	Check Price
13		TONRYCUE Spark Plug Wire Compatible with Harley Davidson Big Twin 1999-2019, and for FXD Dyna...	Check Price
14		NGK 3521 CR9EIX Spark Plug (Iridium IX)	Check Price
15		TONRYCUE 10mm Spark Plug Wires Compatible with Harley Davidson Softail FXST FLST 1984-1999	Check Price
16		HTTMT- Chrome Slotted Finned Spark Plug Head Bolt Covers Compatible with Harley Touring Part Electra...	Check Price
17		NGK # 6046 Iridium Spark Plugs -- DCPR7EIX -- for Harley-Davidson Twin Cam and XL --- 4 PCS NEW	Check Price
18		10mm Spark Plug Wire Fits for Harley Davidson Sportster 883 1200 XL 1986-2003, 2104-0143 - Blue...	Check Price
19		Motoforti 2 Pcs 10.4mm 10mm Spark Plug Wire Kit for Harley Davidson Big Twin FXD Dyna 2000-2017 for...	Check Price
20		AIP Electronics Dragon Fire Race 10.2mm Spark Plug Wire Set for 1999-2017 Harley DYNA Models OEM Fit...	Check Price

Our Favorite Spark Plugs For Harley Reviews:

Bestseller No. 1

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

• Come pre-gapped

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Bestseller No. 2

NGK 6046 DCPR7EIX Spark Plug (Pack of 2)

• Quality Assured

Check Price

Bestseller No. 3

E3 Spark Plugs E3.36 Powersports Spark Plug, Pack of 1

• 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

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Bestseller No. 4

NGK 3932 Standard Spark Plug - DCPR7E, 1 Pack

• Fit Type: Universal Fit
• Package Dimensions: 1.778 H x 7.62 L x 2.286 W (centimeters)
• Package Weight: 0.1 pounds
• Country of Origin : Japan

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Bestseller No. 5

2Pcs CNPAPC Upgrade Double Iridium IX Spark Plugs DCPR7EIX #3144 #6046 #97637 for 1999-2016 Harley Davidson Twin Cam…

• 【SUPER POWER】Double Iridium IX Spark Plugs are designed specifically for the performance enthusiast. Iridium IX offers extreme ignitability, improved throttle response. Double iridium is the best spark plug material
• 【MORE FUEL EFFICIENT】The flameout phenomenon rarely occurs when using double iridium spark plugs,The engine can also be kept in good running condition, resulting in lower fuel consumption. So it is really necessary to replace the good double iridium spark plugs.
• 【LONGER LIFE】The fine Double Iridium tip ensures high durability and a consistently stable spark. Double Iridium alloy has extremely high melting point, perfect for today's high-tech, high-performance engines. Trivalent Metal Plating - Outstanding acceleration, long life ,high fuel efficiency and durability. Ultimate design, technology and performance.
• 【COMPATIBLE MODELS】DCPR7EIX #3144 Replacement racing spark plug used by many professional car drivers and fit for 2000 Dyna Super Glide；1999-2016 Harley Davidson Twin Cam；XL Sportster 883/1200 1986-present; Ultra；Suzuki Boulevard ;If it has the same parameters as this product, it can be compatible
• 【QUICK AFTER SALES SERVICE】One order = 2 Pieces ，We provide 12 months warranty service for this spark plugs, and we attach great importance to every customer's satisfaction. If for any reason we are not meeting your expectations, please feel free to contact us and we will do our best to resolve all your concerns.

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Bestseller No. 6

NGK Iridium IX BKR5EIX-11 Spark Plugs for 1984-2000 Harley Davidson Big Twin (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

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Bestseller No. 7

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

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SaleBestseller No. 8

NGK 7634 Spark Plug, black

• Fit type: Vehicle Specific
• Quality Assured
• Part number: 7634
• Included components: SPARK PL

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Bestseller No. 9

TONRYCUE 10.4mm 10mm Spark Plug Wire Compatible with Harley Davidson Big Twin 1999-2019, and for FXD Dyna Softail

• Compatible with: for Harley-davidson Dyna 2000-2017;Softail 1999-2017
• Material: Made of high quality material, reliable quality and durable
• Package Included: 1 x 8" long wire pre-crimped and 1* 20" long wires pre-crimped
• Note: Please make sure the size of the spark plug if fit your car or not before you order

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Bestseller No. 10

Sportster Sport XL 1200S 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
• Sportster Sport XL 1200S

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Bestseller No. 11

NGK 3932 DCPR7E Standard Spark Plug

• OEM/OES Manufacturer
• High Quality
• World Wide Leader
• Model Number: 3932

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SaleBestseller No. 12

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

• 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) E3.34 spark plug with a 90-day warranty. Features 14mm thread diameter; 0.750-inch thread reach plug with gasket seat; 13/16-inch hex size
• REPLACES: Champion RN9YC, RN11YC, and RN12YC; NGK BPR5ES, BPR6ES, BPR7ES, and BR5ES

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Bestseller No. 13

TONRYCUE Spark Plug Wire Compatible with Harley Davidson Big Twin 1999-2019, and for FXD Dyna Softail (Red)

• Compatible with: for Harley-davidson Dyna 2000-2017;Softail 1999-2017
• Material: Made of high quality material, reliable quality and durable
• Package Included: 1 x 8" long wire pre-crimped and 1* 20" long wires pre-crimped
• Note: Please make sure the car's model if fit your car or not before you order

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Bestseller No. 14

NGK 3521 CR9EIX Spark Plug (Iridium IX)

• OEM/OES Manufacturer
• High Quality
• World Wide Leader

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Bestseller No. 15

TONRYCUE 10mm Spark Plug Wires Compatible with Harley Davidson Softail FXST FLST 1984-1999

• Fitment: for Harley Davidson Softail 1984-1999
• Material: made of high quality material, reliable quality and durable
• Package Included: 2* red spark plug wires
• Note: Please make sure the car's model if fit your car or not before you order

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Bestseller No. 16

HTTMT- Chrome Slotted Finned Spark Plug Head Bolt Covers Compatible with Harley Touring Part Electra Glides Street Glide Road Kings Trikes Road Glides FLT [P/N: MT454]

• Brand: HTTMT
• Take your motor to the next level with the hottest head bolt covers around. Featuring a stepped & slotted design to complement the engine.
• Direct replacement, Easy installation.
• Includes (1) Front Slotted Spark Plug Cover—Chrome, (1) Rear Slotted Spark Plug Cover—Chrome, (1) Hardware Kit Containing: (4) Mounting Caps,
• (4) Socket Head Cap Screws, (8) Set Screws; suggested tools for smooth installation: Set of Hex Wrenches

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Bestseller No. 17

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

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Bestseller No. 18

10mm Spark Plug Wire Fits for Harley Davidson Sportster 883 1200 XL 1986-2003, 2104-0143 - Blue Silicone

• 10mm Spark Plug Wire Fits for Harley Davidson Sportster 883 1200 XL 1986-2003
• The spark plug wire kit fit for Harley Davidson Sportster 883 1200 XL 1986-2003. Warm Tips:Please check the description for the specific model.
• Function - Timely replacement of the damaged spark plug wire can prolong the service life of the engine and reduce fuel waste.10mm high performance ignition wires available for street or race applications.
• High Quality Material - The spark plug wire kit made of high-quality silicone throughout the jacket, wear-resistant, high reliability, long use time, and stable performance.reliable quality and durable.
• You will Get - 2 * Blue Spark Plug Wires (one 8" and one 20" long wires pre-crimped).

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Bestseller No. 19

Motoforti 2 Pcs 10.4mm 10mm Spark Plug Wire Kit for Harley Davidson Big Twin FXD Dyna 2000-2017 for Harley-Davidson Softail 1999-2017 Spark Plug Wires Motorcycle DYNA-409BL Blue Silicone

• [OE Number] DYNA-409BL. This is available for street or race applications.
• [Fitment] For Harley-davidson Dyna FXD 2000-2017, For Harley-davidson Softail 1999-2017. Normally fit for like factory location on cylinder for Harley-Davidson or Big-Twin which has the coil mounted on the seat post. Please confirm make/model/year and size of the spark plug before purchase.
• [Features] Come with 10.4mm & 10mm rubber ends, black 90 degree and straight boots for pre-crimped. Adopted with silicone material for whole jacket, insulation and core to bear high-temperature.
• [Function] Prolong the service time of the engine and reduce fuel waste. A replacement for wire, relocation kits, new look, bobbers, scramblers, cafe racer etc.
• [Package] Include 2x Spark plug wire pre-crimped. Please connect it with original way or search professional video when replace it in doubt.

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Bestseller No. 20

AIP Electronics Dragon Fire Race 10.2mm Spark Plug Wire Set for 1999-2017 Harley DYNA Models OEM Fit PWJ188

• MANUFACTURER: Dragon Fire Performance MODEL: Sport Series Direct Factory Fit
• WIRE DIAMETER & RESISTANCE: 10mm 150 Ohms per foot
• Compatible with 1999-2017 Harley Davidson Dyna Models
• FEATURES: Industry Leading High Heat Silicone - High Performance Coated Copper-Nickel Alloy (CuNi) (3:1) Conductor - Precision Wound at 100 Turns per inch (+/- 10%) for Maximum Voltage Transfer and Superior RFI/EMI Protection - Kevlar Core - High Tensile Strength Fiberglass Protection Mesh - High Temp. Rated to 600F - Extra Thick Boot Wall Design - Long Service Life
• WIRE LENGTHS - 1x8" 1x20"

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Last update on 2023-03-25 / Affiliate links / Images from Amazon Product Advertising API

How to find the best spark plugs for harley?

Here, we’ll be going over a number of factors that you can use to ensure that you’re purchasing the best spark plugs for harley for you.

Regardless of which type of item you’re looking to buy, chances are that there are existing buying guides on the internet, all of which aim to give you good spark plugs for harley recommendations.

Despite these recommendations, however, it’s always a good idea to do your own research. In addition to this research, asking yourself the following questions is also super helpful:

• What features does the spark plugs for harley need to have to be perfect for my needs?
• What is my budget?
• Do I need to purchase a certain brand?

Once you’ve answered these questions and have a good idea of what you’re looking for and the buying process becomes much easier. Keep in mind that when looking for the best product, there’s no need to rush. In fact, very rarely are the ideal products found by choosing the first one you see or by basing your decisions on only one factor. Take your time and enjoy the process!

Now, with the answers to the previous questions in mind, we urge you to use our upcoming buying guide for spark plugs for harley to find what you’re looking for:

Brand

In some cases, the brand of spark plugs for harley is very important. For example, if you’re looking for an item that works in tandem with another, you might very well need both products to be the same brand. If this is the case, it’s vital to pay attention to this factor, as choosing the wrong product can mean the difference between wasting your money and buying a great product that functions as it should.

Features

The features in any given spark plugs for harley are important because they can dictate which version of an item you need and how much money you need to spend. Consider all the key features that you want your item to have and don’t settle for anything that doesn’t check at least ¾ of your boxes.

Reviews

Customer reviews about spark plugs for harley are crucial – especially when you’re buying a product that costs a lot of money or serves a big importance. Luckily, most products can be found online, which means that it’s common for there to be scores of customer reviews from those who have already purchased any given product.

Pay attention to these reviews. Take note of the pros and cons that they mention, and factor these into your big decision. In some cases, you’ll be forced to sacrifice one con in order to gain a particular pro, but being aware of the potential con is going to be beneficial in either case.

Quality

Of course, quality is key. You don’t want to purchase a low-quality product. If you do, you run the risk of your item breaking, not working properly, or otherwise proving to be very disappointing, as well as a waste of money.

You can compare spark plugs for harley quality by researching what your potential purchases are made from, contrasting the individual items against each other to discern which one is made of the best materials.

Warranty

Warranty isn’t always going to be important, but it definitely can be. This is especially true if the item in question is tech-related or expensive. A good warranty will be valid for an extended time after purchase and cover a variety of problems ranging from item defects to random accidents, water damage, and other miscellaneous events that could ruin your product.

Conclusion

The quest to find the best spark plugs for harley can be daunting – but it doesn’t have to be. It can be made much easier by asking yourself a few simple questions and then thinking critically about the items you want to buy. Consider their features, quality, brand, warranty, and customer reviews and you’re more likely to make a great purchase.