Finding The Best Iridium Spark Plugs Buyer’s Guide (2018 Update)

Wondering, how we created this list? It was pretty hard: we had to compare hundreds of various iridium spark plugs. We took into consideration all the important characteristics, such as price, average user score, weight, and many more. If we think that we missed something, let us know about it!
6 Best Iridium Spark Plugs of 2018
Rating | Image | Name and Features | Details |
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1. Ngk 7397 Tr5ix Iridium Ix Spark Plug (Editor’s Choice) The 0.6mm laser welded fine iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect. |
Read reviews |
4.5
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2. Ngk 5464 Bkr5eix-11 Iridium Ix Spark Plug The 0.6 millimeter laser welded fine iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect. |
Read reviews |
4.3
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3. Acdelco 41-110 Oem Gm 12621258 Professional Iridium Spark Plug (Best Versatility Features) Improved cold-starting and acceleration characteristics. |
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4.3
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4. Hivehicle Iridium Spark Plug Updated design reduce the risk of breaking off during working. |
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4.0
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5. 6 New Ngk Iridium Ix Spark Plugs Plugs feature a fine-wire iridium center electrode and nickel-alloy ground electrodes for maximum engine horsepower and torque. |
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3.5
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6. 6 Pcs Denso Iridium Long Life Spark Plugs Uses the same high performance laser welding process as the high end iridium power spark plug. |
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5/5
5/5
5/5
5/5
Overall | Brand | Model | Dimensions | Weight | Details |
5.0
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NGK | 7397-4PK | 4.1 x 3.5 x 1 inches | 2.4 ounces |
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Trivalent metal plating – superior anti-corrosion and anti-seizing properties. Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today’s high-performance engines. Designed specifically for the performance enthusiast, iridium ix offers extreme ignitability, improved throttle response and superior anti fouling. Longer insulator nose prevents fouling, the corrugated ribs on insulator prevents flashover, and a triple gasket seal eliminates combustion gas leakage. The 0.6mm laser welded fine iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect.
5/5
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Overall | Brand | Model | Dimensions | Weight | Details |
4.5
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NGK | 5464-4PK | 3.4 x 0.8 x 0.7 inches | 6.4 ounces |
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Longer insulator nose prevents fouling, the corrugated ribs on insulator prevents flashover, and a triple gasket seal eliminates combustion gas leakage. The 0.6 millimeter laser welded fine iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect. Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today’s high performance engines. Trivalent metal plating provides superior anti-corrosion and anti-seizing properties; part number of spark plug inside the box: bkr5eix-11.
Designed specifically for the performance enthusiast, iridium ix offers extreme ignitability, improved throttle response and superior anti-fouling.

What did you do to create the TOP list of iridium spark plugs?
During the creation of this buying guide, we had to look through hundreds of iridium spark plugs. Our team compared many products from various brands in order to find the most optimal model with the best price to quality ratio. The goal was to determine iridium spark plugsthat offer the most value for their money, and we think that we have achieved it.
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Overall | Brand | Model | Dimensions | Weight | Details |
4.3
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ACDelco | – | 6 x 2 x 8 inches | 12.8 ounces |
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Improved cold-starting and acceleration characteristics. Reduced ignition system voltage demands saves wear and tear. Latest evolution in high-performance plug electrode material and new-vehicle applications using iridium plugs continues to increase. Acdelco is an original equipment (oe) supplier and has the experience engineering and manufacturing components that achieve the highest quality standards required by vehicle manufacturers. Iridium tip for maximum resistance to spark erosion and corrosive combustion chamber environment. Spark gap remains virtually unchanged during the life of the plug for increased fuel efficiency and 12-month/12.000-mile limited warranty.
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Overall | Brand | Model | Dimensions | Weight | Details |
4.3
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HiVehicle | – | – | 13.6 ounces |
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High quality material: purified alumina powder insulator from germany almatis(model: hva fg q0 and full-automatic isopressing; iron shell(model: 20 08 al) and automatic welding/rolling bending; central electrode(99% nickel clad copper ) and 360 degree laser welding iridium & platinum. Reduce the risk: updated design reduce the risk of breaking off during working. Increases fuel efficiency: g-power platinum alloy spark plugs offer superior performance with improved fuel efficiency, lower emissions, and quicker starts. Increased conductivity: increased conductivity and heat control for good overall. Stability: 0.6mm laser welded fine platinum tip reduces required voltage ensuring high durability and a consistently stable spark.
Durability: trivalent metal plating offers superior anti corrosion and anti seizing properties while the triple gasket seal eliminates combustion gas leakage.

How did you make the list of the best iridium spark plugs?
In order to create this buying guide, our team had to go through hundreds of user reviews and compare dozens of iridium spark plugs models and brands. Finding the best iridium spark plugs nowadays is a hard task: the selection on the market is so high that you would have to spend months to study all available options. Thankfully, our TOP list will help you find a good iridium spark plugs much quicker!
5/5
3/5
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Overall | Brand | Model | Dimensions | Weight | Details |
4.0
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NGK | 5464 | – | 10.4 ounces |
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Trivalent metal plating has superior anti-corrosion and anti-seizing properties. Designed for fuel-injected and turbocharged engines. Plugs feature a fine-wire iridium center electrode and nickel-alloy ground electrodes for maximum engine horsepower and torque. Precision laser-welded electrode construction. Extreme performance upgrade over oem spark plugs and provide a 40.000 to 50.000 mile service life.
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Overall | Brand | Model | Dimensions | Weight | Details |
3.5
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Sixity Auto | – | – | 11.5 ounces |
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Improve engine horsepower and fuel economy over standard plugs. The same plugs factory-installed on luxury vehicles by automakers such as gm, toyota, honda and mitsubishi. Uses the same high performance laser welding process as the high end iridium power spark plug. Endures extreme temperatures greater than 4.000f associated with high-performance ignition and special fuel systems. Iridium is the most corrosion-resistant metal used in plugs today.
What if a receive a wrong item instead of the iridium spark plugs I ordered?
There is no need to worry since the support team will help you to return your money or replace the wrong item with the chosen iridium spark plugs. Simply contact a support agent and describe your situation to get all the required help.
Should I get a iridium spark plugs with a lifetime warranty?
Every manufacturer offer various warranty terms. Some companies sell iridium spark plugswith a lifetime warranty, while the others only offer one-year or two-year protection. The cheapest models usually do not have any warranties at all. We think that five-year warranty is more than enough for the most iridium spark plugs.
What should be the warranty period for a good iridium spark plugs?
We highly recommend you to buy iridium spark plugsfrom brands that offer prolonged warranty. If something goes wrong and your iridium spark plugs breaks down, you will be able to repair it without spending a single penny. Most companies offer a two-year warranty for their products.
Contact me if you have any questions:
+1 212-689-9781
ron@damremo.com
276 5th Ave Suite 704 New York, NY 10001
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