The Best Copper Automotive Replacement Spark Plugs of 2023

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We ranked and reviewed the top 10 Best Copper Automotive Replacement Spark Plugs in 2023. Read more How we ranked

Emily Sloyan
Jun 2, 2023 11:34 AM

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Autolite 3924 Spark Plug Copper Core (4 Pack)

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SCORE
9.2
KT Score

KT Score is a ranking system developed by our team of experts. It from 0 to 10 are automatically scored by our advanced technological tool based upon the data collected. Our website is an independent organization and has no relation to the manufacturers, so our reviews are completely objective.
Brand
Autolite

Features

Sold in packs of 4

PROS

CONS

Autolite Box of 4 Genuine 275 Copper Non-Resistor Spark Plug

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SCORE
8.1
KT Score

KT Score is a ranking system developed by our team of experts. It from 0 to 10 are automatically scored by our advanced technological tool based upon the data collected. Our website is an independent organization and has no relation to the manufacturers, so our reviews are completely objective.
Brand
Autolite

Features

· Brand New Box of 4 Autolite Spark Plugs

· Genuine Autolite Part # 275 Copper-glass seal bonded insulator, terminal post, and center electrode provide a tight seal that is 100 percent leak-proof Multi-rib insulator reduces danger of "flash-over" to prevent misfires Full copper core electrode improves heat transfer and optimizes plug life Copper core center electrode provides higher thermal conductivity Features high alumina ceramic for high dielectric strength and steel shell for installation robustness

Multi-rib insulator reduces danger of "flash-over" to prevent misfires

Full copper core electrode improves heat transfer and optimizes plug life

Copper core center electrode provides higher thermal conductivity

PROS

CONS

Autolite 4194-4PK Copper Non-Resistor Spark Plug, Pack of 4

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SCORE
9.9
KT Score

KT Score is a ranking system developed by our team of experts. It from 0 to 10 are automatically scored by our advanced technological tool based upon the data collected. Our website is an independent organization and has no relation to the manufacturers, so our reviews are completely objective.
Brand
Autolite

Features

Copper-glass seal bonds insulator, terminal post, and center electrode together to provide a tight seal that is 100 percent leak-proof

Cold-formed steel shell and precision rolled threads, with one-piece terminal post to add strength

Multi-rib insulator reduces danger of "flash-over"

Resistor reduces radio frequency interference (RFI) and electrode erosion

Full copper core electrode provides better performance in all conditions

Fit type: Vehicle Specific

PROS

CONS

V-Twin 32-0648 - Yellow Copper Core 7mm Spark Plug Wire Kit

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SCORE
7.7
KT Score

KT Score is a ranking system developed by our team of experts. It from 0 to 10 are automatically scored by our advanced technological tool based upon the data collected. Our website is an independent organization and has no relation to the manufacturers, so our reviews are completely objective.
Brand
V-TWIN MANUFACTURING

Features

Yellow Copper Core 7mm Spark Plug Wire Kit

PROS

CONS

Champion Copper Plus 446 Spark Plug (Carton of 1)

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SCORE
7.8
KT Score

KT Score is a ranking system developed by our team of experts. It from 0 to 10 are automatically scored by our advanced technological tool based upon the data collected. Our website is an independent organization and has no relation to the manufacturers, so our reviews are completely objective.
Brand
Champion

Features

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

PROS

CONS

Champion Copper Plus 82 Spark Plug (Carton of 1)

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SCORE
7.2
KT Score

KT Score is a ranking system developed by our team of experts. It from 0 to 10 are automatically scored by our advanced technological tool based upon the data collected. Our website is an independent organization and has no relation to the manufacturers, so our reviews are completely objective.
Brand
Champion

Features

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

PROS

CONS

Champion Copper Plus 570 Spark Plug (Carton of 1)

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SCORE
7.5
KT Score

KT Score is a ranking system developed by our team of experts. It from 0 to 10 are automatically scored by our advanced technological tool based upon the data collected. Our website is an independent organization and has no relation to the manufacturers, so our reviews are completely objective.
Brand
Champion

Features

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

PROS

CONS

Champion Copper Plus 439 Spark Plug (Carton of 1)

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SCORE
8.9
KT Score

KT Score is a ranking system developed by our team of experts. It from 0 to 10 are automatically scored by our advanced technological tool based upon the data collected. Our website is an independent organization and has no relation to the manufacturers, so our reviews are completely objective.
Brand
Champion

Features

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

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

PROS

CONS

Bosch Automotive 9603 Double Iridium OE Replacement Spark Plug Up to 4X Longer Life (1 Pk) Acura Chrysler Ford Honda Infiniti Jaguar Lexus Mercedes-Benz Mitsubishi Nissan Subaru Toyota +More

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SCORE
9.2
KT Score

KT Score is a ranking system developed by our team of experts. It from 0 to 10 are automatically scored by our advanced technological tool based upon the data collected. Our website is an independent organization and has no relation to the manufacturers, so our reviews are completely objective.
Brand
Bosch Automotive

Features

Double Iridium firing pin and ground electrode inlay provide 4X longer service life compared to standard copper plugs

0.6mm fine wire firing pin provides superior ignitability and performance

360° continuous laser weld fuses corrosion resistant iridium firing pin to base for increased durability

International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

PROS

CONS

Autolite Box of 4 Genuine 425 Copper Resistor Spark Plugs

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SCORE
8.8
KT Score

KT Score is a ranking system developed by our team of experts. It from 0 to 10 are automatically scored by our advanced technological tool based upon the data collected. Our website is an independent organization and has no relation to the manufacturers, so our reviews are completely objective.
Brand
Autolite

Features

· Brand New Box of 4 Autolite Spark Plugs

· Genuine Autolite Part # 425 Copper-glass seal bonded insulator, terminal post, and center electrode provide a tight seal that is 100 percent leak-proof Multi-rib insulator reduces danger of "flash-over" to prevent misfires Full copper core electrode improves heat transfer and optimizes plug life Copper core center electrode provides higher thermal conductivity Features high alumina ceramic for high dielectric strength and steel shell for installation robustness

Multi-rib insulator reduces danger of "flash-over" to prevent misfires

Full copper core electrode improves heat transfer and optimizes plug life

Copper core center electrode provides higher thermal conductivity

PROS

CONS

Last update on 2023-06-02 / Prices / Affiliate links / Images, and Product Highlights from Amazon Product Advertising API

Editor's Notes

We ranked and reviewed the top 10 Best Copper Automotive Replacement Spark Plugs in 2023. With the support of 49,977 customer's reviews, we hope that this article can give you the most realistic view of these products. The list below contains some main brands as autolite, v-twin-manufacturing, champion, bosch-automotive.