The Best Spark Plugs

Best image of spark plugs
Photo: BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Pack of 4
UPDATED JUNE 14, 2025

To help you find the perfect spark plug, we continuously put forth the effort to update and expand our list of recommendable spark plugs. Our team collects, edits and publishes new information, in order to present it to you in an accurate, significant and neatly arranged way.

Our Picks

BOSCH 9621 OE Fine Wire Double Iridium Plug image
Bosch Double Iridium Spark Plugs feature both an iridium firing pin and an ir...
BOSCH 9603 OE Fine Wire Double Iridium Plug image
Bosch Double Iridium Spark Plugs feature both an iridium firing pin and an ir...
NGK LKR7DIX-11S Iridium IX Plug image
Designed specifically for the performance enthusiast, Iridium IX offers extre...
Our Choice
BOSCH 9621 OE Fine Wire Double Iridium Plug image
Bosch Double Iridium Spark Plugs feature both an iridium firing pin and an ir...
BOSCH 9603 OE Fine Wire Double Iridium Plug image
Bosch Double Iridium Spark Plugs feature both an iridium firing pin and an ir...
Low Price
NGK LKR7DIX-11S Iridium IX Plug image
Designed specifically for the performance enthusiast, Iridium IX offers extre...

8 More Spark Plug Alternatives

G-Power Platinum

Designed to operate over a much wider heat range than ordinary plugs

Resists carbon buildup and pre-ignition

Often specified as original equipment, NGK spark plugs are the best combination of perf...

Offering the Quality, Reliability and Durability You'd Expect from an OEM Manufacturer

NGK is the world's largest supplier of OEM spark plugs

designed specifically for the performance enthusiast, iridium ix offers extreme ignitab...

the 0.6mm laser welded fine iridium tip ensures high durability and a consistently stab...

longer insulator nose prevents fouling, the corrugated ribs on insulator prevents flash...

Solid copper core for greater spark

Longer insulator nose prevents fouling

Corrugated ribs on insulator prevents flashover

Designed to operate over a much wider heat range than ordinary plugs

Resists carbon buildup and pre-ignition

Patented triple gasket sealing process eliminates the possibility of combustion gas lea...

One-piece, fired-in suppressor seal blends three glass types for a gas-tight seal that ...

Double platinum point pad on center and ground electrode offer excellent durability and...

Pure copper core results in cooler electrode temperature for maximized durability and f...

Includes (2) RC12YC Spark Plugs.

New, Bulk Packed.

Genuine Champion Spark Plugs.

Buying Guide

Top Rated Spark Plugs

If you're looking into finding the best rated spark plug, you should probable check out the BOSCH 9603 OE Fine Wire Double Iridium Plug. We looked at various sources of reviews and found this one to have the best mix between review count and average rating stars.

BOSCH 9603 OE Fine Wire Double Iridium Plug

The Lowest Price We Could Find

Often, going for the best price is a simple but good option. With a price of $7.29 (last checked this morning), we do not list any other spark plugs cheaper than the ACDelco GM Original Equipment 41-962 Double Platinum Plug. Just remember that it's not always the best option to go for the cheapest one.

ACDelco GM Original Equipment 41-962 Double Platinum Plug

The Spark Plug With the Most Reviews

With at least 725 reviews and counting, the BOSCH 9603 OE Fine Wire Double Iridium Plug might be another option to consider. This large amount of reviews signalizes that many people are using it, with most of them beeing satisfied.

High Quality Spark Plugs

It's quite rare that the saying "You get what you pay for" turns out incorrect. If you have the money on the sideline, feel free to choose the most expensive item from our list: The NGK 4344 LTR5IX-11 Plug currently sells for $33.95.

NGK 4344 LTR5IX-11 Plug

The Spark Plug With the Most Clicks

If you trust us and our users, feel free to check out the BOSCH 9621 OE Fine Wire Double Iridium Plug. Our statistics say that it is the most favorite Spark Plug from the list above.

BOSCH 9621 OE Fine Wire Double Iridium Plug

Our Bestseller

If you're still undecided, I would recommend that you go with the masses and choose the top selling spark plug: The NGK # 3186 G-Power Platinum Plugs is the hottest bestseller in this category right now.

NGK # 3186 G-Power Platinum Plugs

Spark Plug Reviews

There are no reviews on spark plugs, yet.
Be the first to write a review, or check for additional reviews in the Further Reading section below.

Further Reading on Spark Plugs

New: Our editorial list of additional articles. We decided to gather informartion all around the internet and present you a list of helpful, external links to interesting reads about reviews, pros & cons and similar products.
E3 Spark Plugs Reviews of 2018 (Updated) - Automobil...
Here we've written a details review on e3 spark plugs with features, also make the best 6 List. Pros & Cons of this Product  ...
0 persons liked this post.
helpful or not helpful
Pros and Cons of Iridium VS Platinum Spark Plugs - O...
When air and fuel start to mix inside of the internal combustion chamber, it needs an electrical spark to ignite. The ignition coil is attached to  ...
0 persons liked this post.
Source: oards.com
helpful or not helpful
Iridium vs Platinum Spark Plugs — Howrah.org
Iridium VS Platinum Spark Plugs. Learn about pros and cons of spark plugs made using various materials, including copper, platinum and iridium. Decide what  ...
0 persons liked this post.
helpful or not helpful
4 Types of Spark Plugs: Copper vs Iridium vs Platinu...
After all, the general purpose of a spark plug is to generate an electric Pros – Lasts longer than copper; Reduces debris buildup; Cons – Not  ...
0 persons liked this post.
helpful or not helpful
Spark plug cross reference
Convert one spark plug brand to another. Huge database covering >300 different brands and thousands of spark plugs and glow plugs. ...
0 persons liked this post.
helpful or not helpful
Copper vs Iridium/Platinum Spark Plugs ( Pros and Co...
It is better to stick with what your car came installed with. Both types of spark plugs have their pros and cons. Copper for performance and ...
0 persons liked this post.
helpful or not helpful

Research

Do you want to know more about spark plugs? Check out the links below to gain knowledge about the whole topic of spark plug products.

Useful Videos

How Long do NGK Iridium Spark Plugs Last? - A 100k Mile Review

In this video we review how long do NGK Iridium Spark Plugs last and what they look like after 100000 miles. If you are curious if these plugs can last a long time ...

Disclaimer: This video was not made by us, but we found it interesting enough to embed it here.

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