Top 8 Copper Spark Plugs – Automotive Replacement Spark Plugs

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1. NGK

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NGK 7090 BKR5EGP G-Power Spark Plug, Pack of 4

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NGK #ad - G-power platinum alloy spark Plugs offer superior performance with improved fuel efficiency, lower emissions, and quicker starts. Special configurations are used for the insulator noses to improve throttle response and prevent fouling with corrugated ribs on insulator to prevent flashover.

Platinum alloy ground and center electrode for greater spark while ensuring precise gap during the life of the plug. Trivalent metal plating offers superior anti corrosion and anti seizing properties while the triple gasket seal eliminates combustion gas leakage. 06mm laser welded fine Platinum tip reduces required voltage ensuring high durability and a consistently stable spark.
BrandNGK #ad
ManufacturerNGK #ad
Height0.9 Inches
Length3.4 Inches
Weight0.18 Pounds
Width1.1 Inches
Part Number7090
Model7090-4PK

2. Champion

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Champion REC12MCC4 446 Copper Plus Replacement Spark Plug, Pack of 1

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Champion #ad - Maximum emi & rfi suppression: Patented SAC-9 semi-conductor resistor for ultimate suppression. Compatible with the following Applications: Automotive, Commercial. Hex size: 5/8 inch. Dependable and durable: Built to ISO and SAE standards for proven performance. Copper core center electrode: Allows for accurate control of heat range for longer life. Maximum corrosion Resistance: Thanks to a Patented Ultraseal coated shell.
BrandChampion #ad
ManufacturerFederal Mogul #ad
Height0 Inches
Length0 Inches
Weight0.13 Pounds
Width0 Inches
Part Number446
Model446
Warranty2 Year unlimited mileage guarantee or the Manufacturer recommended change interval, whichever comes last. Excludes Commercial or performance usage

3. Autolite

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Autolite APP5325-4PK Double Platinum Spark Plug, Pack of 4

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Autolite #ad - High nickel alloy side electrode maintains precise gap. Works to optimize engine performance for a longer life and improved fuel economy. Necked-down center electrode fires quicker and cleaner, with less voltage for easier starts and quicker acceleration. Full copper core electrode provides better performance in all conditions. Full platinum tips ensure virtually no gap erosion.
BrandAutolite #ad
ManufacturerAutolite #ad
Height1.2 Inches
Length4.3 Inches
Weight0.5 Pounds
Width3.6 Inches
Part NumberAPP5325
ModelAPP5325-4PK

4. Champion

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Champion RJ19HX 973 Copper Plus Small Engine Replacement Spark Plug Pack of 1

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Champion #ad - Dependable and proven performance. Increased conductivity and heat control for good overall wear. Compatible with Lawn & Garden and Snow applications. Superior corrosion resistance. Resists fouling.
BrandChampion #ad
ManufacturerChampion #ad
Height0.8 Inches
Length3.8 Inches
Weight0.1 Pounds
Width0.9 Inches
Part Number973
Model973
WarrantyNon automotive spark plug guarantee. When installed in accordance with Champion recommendations, Champion Copper Plus small engine spark plugs will meet and/or exceed the warranty requirements of the vehicle and or engine manufacturer.

5. ACCEL

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ACCEL 0526-4 Copper Core Spark Plug, Pack of 4

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ACCEL #ad - Considerably hotter spark creates a more efficient burn of the air fuel mixture in the combustion chamber. Significantly more power at high RPM with less fouling misfire and flame dissipation. Machine rolled 14MM threads protect your cylinder heads. Redesigned to reflect advancements in cylinder head and fuel management technology. Instant throttle response and noticeably better fuel economy.
BrandACCEL #ad
ManufacturerACCEL #ad
Height4.9 Inches
Length0.9 Inches
Weight0.35 Pounds
Width3.6 Inches
Part Number0526-4
Model0526-4
Warranty90 Days

6. Champion

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Champion RE14MCC4 570 Copper Plus Replacement Spark Plug, Pack of 1

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Champion #ad - Copper core center electrode: Allows for accurate control of heat range for longer life. Compatible with the Following Applications: Automotive. Maximum emi & rfi suppression: Patented SAC-9 semi-conductor resistor for ultimate suppression. Dependable and durable: Built to ISO and SAE standards for proven performance. Maximum corrosion Resistance: Thanks to a Patented Ultraseal coated shell.
BrandChampion #ad
ManufacturerChampion #ad
Height3.94 Inches
Length3.94 Inches
Weight0.06 Pounds
Width3.94 Inches
Part Number570
Model570
Warranty2 Year unlimited mileage guarantee or the Manufacturer recommended change interval, whichever comes last. Excludes Commercial or performance usage

7. Champion

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Pack of 1, Champion RC7YC 340 Copper Plus Replacement Spark Plug

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Champion #ad - Compatible with the Following Applications: Automotive, Powersport. Dependable and durable: Built to ISO and SAE standards for proven performance. Maximum corrosion Resistance: Thanks to a Patented Ultraseal coated shell. Copper core center electrode: Allows for accurate control of heat range for longer life. Maximum emi & rfi suppression: Patented SAC-9 semi-conductor resistor for ultimate suppression.
BrandChampion #ad
ManufacturerChampion #ad
Height0.9 Inches
Length3.8 Inches
Weight0.14 Pounds
Width1 Inches
Part Number340
Model340
Warranty2 Year unlimited mileage guarantee or the Manufacturer recommended change interval, whichever comes last. Excludes Commercial or performance usage

8. Autolite

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Pack of 4, Autolite 3924-4PK Copper Resistor Spark Plug

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Autolite #ad - Resistor reduces radio frequency interference RFI and electrode erosion. Full copper core electrode provides better performance in all conditions. Multi-rib insulator reduces danger of "flash-over". Cold-formed steel shell and precision rolled threads, with one-piece terminal post to add strength. Copper-glass seal bonds insulator, terminal post, and center electrode together to provide a tight seal that is 100 percent leak-proof.
BrandAutolite #ad
ManufacturerAutolite #ad
Height3.5 Inches
Length1 Inches
Weight0.1 Pounds
Width4 Inches
Part Number3924
Model3924-4PK
WarrantyLifetime Limited Warranty