Best Single Spark Plugs of 2026

Name: NGK G-Power Platinum Spark Plugs TR5GP
Brand: NGK

Robert Reyes

Last Updated: Jan 25, 2026

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Single spark plugs are a crucial component of any gasoline-powered engine, whether it's in a car, motorcycle, or lawn mower. These small devices are responsible for igniting the fuel in the engine's combustion chamber, which in turn powers the vehicle or machine. Single spark plugs are designed to work with one cylinder at a time, and they come in a variety of sizes and configurations to fit different engines. They are typically made of durable materials like ceramic and metal, and they can last for thousands of miles before needing to be replaced. Overall, single spark plugs are an essential part of keeping gasoline engines running smoothly and reliably.

At a Glance: Our Top Picks

#TOP 1

NGK G-Power Platinum Spark Plugs TR5GP

9.9

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#TOP 2

NGK 6703 BPMR7A Copper Spark Plug 2-Pack

9.8

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#TOP 3

NGK Iridium IX Spark Plug

9.6

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Top 10 Single Spark Plugs

#TOP 1 Best Platinum Spark Plug

NGK G-Power Platinum Spark Plugs TR5GP

NGK
TR5GP

NGK # 3186 G-Power Platinum Spark Plugs TR5GP - 8 PCSNEW

The NGK G-Power Platinum Spark Plugs TR5GP is designed to operate over a wider heat range than ordinary plugs, resist carbon buildup, and pre-ignition. The patented triple gasket sealing process eliminates the possibility of combustion gas leakage, ensuring reliable performance.

9.9

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What We Like

Improved engine performance
Easy installation
Good value for price
Reliable OEM replacement
Smoother idle and driving

#TOP 2

NGK 6703 BPMR7A Copper Spark Plug 2-Pack

NGK
6703

NGK (6703) BPMR7A Spark Plugs Individual Boxed - 2 Pack, Copper

The NGK Copper Spark Plugs come in a convenient 2-pack, giving you a reliable option when you need to replace your vehicle's spark plugs. These are genuine NGK parts, so you can trust their quality and performance for your engine. Each spark plug is packaged individually with original hardware, making installation easier and ensuring you have everything you need right out of the box. Plus, these plugs are designed as direct replacements, so you can swap them into your vehicle with confidence. Be sure to confirm your vehicle’s fitment to guarantee compatibility and smooth operation.

9.8

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What We Like

OEM fit and compatibility
Consistent reliable performance
Enhanced ignition efficiency
Good value for money
Pre-gapped to factory spec

#TOP 3 Best Iridium Spark Plug

NGK Iridium IX Spark Plug

NGK
LKAR7BIX-11S

NGK LKAR7BIX-11S Iridium IX Spark Plug (93501 Iridium Ix), 4 Pack

The NGK Iridium IX Spark Plug is designed for performance enthusiasts, offering improved throttle response, anti-fouling, and extreme ignitability. The spark plug features a 0.6mm laser-welded fine iridium tip that ensures high durability and consistent, stable sparks. A tapered ground electrode helps minimize the electrical quenching effect, while a longer insulator nose prevents fouling. The spark plug also has superior anti-corrosion and anti-seizing properties thanks to its trivalent metal plating.

9.6

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What We Like

OEM quality and fit
Improved engine performance
Smoother acceleration
Good value for money
Easy installation

#TOP 4

NGK Iridium IX Spark Plug, 4 Pack

NGK
LKR7DIX-11S

NGK LKR7DIX-11S Iridium IX Spark Plug (93175 Iridium Ix), 4 Pack

The NGK LKR7DIX-11S Iridium IX Spark Plug is designed for performance enthusiasts, offering extreme ignitability and improved throttle response. Its laser-welded fine Iridium tip ensures high durability and a consistently stable spark, while the tapered ground electrode minimizes electrical quenching effect. The corrugated ribs on the longer insulator prevent flashover, and the triple gasket seal eliminates combustion gas leakage. The Iridium alloy has an extremely high melting point, making it durable to heat and electrical wear, perfect for high-performance engines. The Trivalent Metal Plating provides superior anti-corrosion and anti-seizing properties.

9.5

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What We Like

Smooth engine performance
Easy installation
Long-lasting durability
Perfect OEM fit
Affordable price

#TOP 5

(6-Pack) NGK Spark Plugs TR55

NGK
3951

NGK 3951 Spark Plugs TR55 (6 Pack)

NGK Spark Plugs TR55 is designed to work in a wider heat range, resist carbon buildup, and eliminate the possibility of combustion gas leakage with its patented triple gasket sealing process. It has been a reliable OE cornerstone for decades.

9.5

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What We Like

Works in a wider heat range
Resists carbon buildup
Eliminates possibility of combustion gas leakage

#TOP 6

NGK 6619 Iridium Spark Plugs

NGK
6619

NGK 6619 Iridium Spark Plugs LFR6AIX-11-6 PCSNEW

NGK 6619 Iridium Spark Plugs are designed to operate over a wider heat range than ordinary plugs, resist carbon buildup and pre-ignition, and eliminate the possibility of combustion gas leakage with its patented triple gasket sealing process. These spark plugs are ideal for anyone who wants a durable and reliable option for their vehicle.

9.4

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What We Like

Improved car performance
Better fuel efficiency
Compatible with Toyotas
Legitimate product quality
Reasonable pricing

#TOP 7

NGK Iridium IX DCPR7EIX Spark Plugs

NGK
DCPR7EIX

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

Features

The Ultimate In Spark Plug Technology And Performance From The Industry Leader
Come Pre-Gapped
Ultra-Small Diameter Center Electrode Reduces Voltage Requirement And Extends Ignition System Life

9.2

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#TOP 8

DENSO #4503 PLATINUM T Spark Plugs

Denso
PK16TT

6 PCSNEW -- DENSO #4503 PLATINUM T T Spark Plugs -- PK16TT

DENSO Platinum Spark Plugs feature a unique Twin-Tip Structure that enhances performance by providing a 1.1mm platinum center electrode. The 360 Laser welding ensures a secure connection, while the Titanium-enhanced alloy on the ground electrode increases durability, reducing tip erosion. These spark plugs are designed to optimize ignition, ensuring efficient combustion in your vehicle, resulting in improved fuel efficiency and smoother engine operation.

9.1

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What We Like

Enhanced Performance
Durable Construction
Optimized Ignition

#TOP 9 Best Spark Plug for AC Delco

ACDelco Iridium Spark Plug

ACDelco
41-162
1 Count (Pack of 1)

ACDelco GM Original Equipment 41-162 (19417055) Iridium Spark Plug

The ACDelco GM Original Equipment 41-162 Iridium Spark Plug features an iridium composition that provides high melting point and great strength, resulting in excellent wear resistance and durability. The spark plug offers reliable cold starting, quick acceleration, smooth performance, and excellent engine idle stability. The three-piece fired in suppressor seal meters spark energy for long electrode life, prevents combustion leakage, and blocks radio frequencies that can affect vehicle electronics. ACDelco GM Original Equipment parts are designed, engineered, and tested to rigorous standards for Chevrolet, Buick, GMC, or Cadillac vehicles.

8.9

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What We Like

Durable and long-lasting
Reliable cold starting and quick acceleration
Excellent engine idle stability and smooth performance

#TOP 10

ACDelco Professional Platinum Spark Plug

ACDelco
41-962

ACDelco 41-962 Professional Platinum Spark Plug, (8)

The ACDelco Professional Platinum Spark Plug offers a one-piece, gas-tight seal and a double platinum point pad that provides consistent voltage demands, prevents wear on the ignition system and protects against compression pressures. With pure copper core, this spark plug can maximize durability and reduce fouling resistance. Formerly known as ACDelco GM Original Equipment parts.

8.8

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What We Like

Improved engine performance
Well packaged, no damage
Correct gaps lead to better sound
Easy installation process

Frequently Asked Questions (FAQs)

1. Can I buy just one spark plug?

You want all of your spark plugs to match and have nearly the same levels of electrical resistance as all of the other plugs. This make the engine run smoothly. If you had one spark plug firing properly and three that were not you could damage your engine as it would be a bit out of balance.

2. What is the difference between single or double spark plug?

Platinum spark plugs come in two varieties - single and double platinum. A single platinum plug is much like a copper spark plug with a platinum disc welded to the center electrode; a double platinum spark plug has a platinum disc on both the center and side electrodes.

3. Are twin spark plugs better?

The logic behind this technology is that two spark plugs can burn the fuel/air mixture much quicker than a single spark plug by ignition at two different points at once thereby giving twin spark engine cars a greater efficiency.

4. How much is a single spark plug?

Spark plugs generally cost less $10 each. The cost depends on the expected life and material used on the electrode. Platinum- or iridium-tipped plugs using laser technology cost the most: as much as $25 each.

Editor's Notes

During our single spark plug research, we found 24 single spark plug products and shortlisted 10 quality products. We collected and analyzed 122,051 customer reviews through our big data system to write the single spark plugs list. We found that most customers choose single spark plugs with an average price of $28.62.

The single spark plugs are available for purchase. We have researched hundreds of brands and picked the top brands of single spark plugs, including NGK, Denso, ACDelco. The seller of top 1 product has received honest feedback from 26,936 consumers with an average rating of 4.9.

Written by

Robert Reyes

Robert Reyes is a dedicated writer from San Francisco with a bachelor of degree in mechanics and a bachelor of degree in marketing. He focuses on making some complicated topics simple and enjoys explaining complex and technical things in an easy-to-understand way.