NGK

NGK — The World's #1 Spark Plug Brand

NGK has been manufacturing spark plugs and ignition components since 1936, earning the position of the world's most widely used spark plug brand through consistent quality, precise application engineering, and a product lineup that covers virtually every gasoline and diesel engine on the road. From standard copper plugs to laser iridium performance units, NGK produces spark plugs for OEM factory fill, replacement service, and high-performance applications — with the same engineering rigor applied to every tier of the product lineup.

Copper Spark Plugs

NGK's copper core spark plugs are the baseline of the lineup, providing reliable ignition performance for standard replacement applications across a wide range of domestic and import engines. Copper core construction provides excellent thermal conductivity for consistent heat range performance, with NGK's corrugated ribs and triple gasket seal preventing flashover and ensuring a leak-free installation. Copper plugs are the correct choice for older engines with conventional ignition systems and for applications where plug replacement is performed at standard service intervals.

Platinum & Double Platinum Spark Plugs

NGK platinum spark plugs extend service life beyond copper plugs through a platinum firing tip that resists electrode wear at the higher temperatures generated by modern engine management systems. Double platinum designs place platinum on both the center and ground electrodes, providing consistent gap maintenance over extended service intervals on waste-spark ignition systems where both electrodes experience equal wear. Platinum plugs are the correct OEM-specification replacement for most modern domestic and import vehicles with extended tune-up intervals.

Iridium & Laser Iridium Spark Plugs

NGK's iridium spark plug lineup represents the highest tier of the product range, with iridium firing tips that provide the longest service life and most consistent spark performance of any plug construction. The fine-wire iridium center electrode requires less voltage to fire than a conventional electrode, reducing ignition system load and improving spark reliability at high RPM and under boost. Laser Iridium plugs use a laser-welded iridium tip on both the center and ground electrodes for maximum durability and consistent gap maintenance over 100,000-mile service intervals on supported applications.

For performance and forced induction applications, NGK's iridium plugs provide the spark reliability needed at elevated cylinder pressures where conventional plugs misfire. The reduced firing voltage requirement of the fine-wire iridium electrode is particularly beneficial in turbocharged and supercharged engines where cylinder pressure at ignition timing is significantly higher than a naturally aspirated equivalent.

Racing Spark Plugs

NGK produces a dedicated racing spark plug lineup for competition applications where standard plugs are insufficient for the heat range, electrode configuration, or firing voltage requirements of the engine. Racing plugs are available in a wide range of heat ranges to match the specific thermal load of different engine combinations, fuel types, and boost levels. Correct heat range selection is critical in race applications — a plug that is too cold will foul, while a plug that is too hot risks pre-ignition and engine damage.

Oxygen Sensors

NGK produces OEM-quality oxygen sensors and air/fuel ratio sensors for a wide range of domestic and import vehicles. Wideband and narrowband sensor options cover both pre-cat and post-cat sensor positions, with direct-fit connectors and correct thread pitch for each supported application. NGK oxygen sensors meet or exceed OEM specifications for response time, accuracy, and service life — ensuring correct fuel trim operation and emissions system function after replacement.

Common Applications

NGK spark plugs and sensors cover virtually every domestic and import vehicle platform — including GM, Ford, Chrysler/Mopar, Toyota, Honda, Subaru, Nissan, BMW, Mercedes-Benz, Volkswagen, and Audi applications across all engine types and model years. NGK's application database is the most comprehensive in the spark plug industry, with OEM-specification plugs for current-model-year vehicles and replacement plugs for vintage and classic applications.

Installation Notes

NGK spark plugs are pre-gapped to the OEM specification for most applications — verify the gap against the vehicle specification before installation and adjust carefully if needed, as iridium and platinum fine-wire electrodes are more fragile than copper electrodes and can be damaged by aggressive gapping. Apply anti-seize to plug threads only if specified by the vehicle manufacturer — NGK plugs have a nickel-plated shell that provides adequate corrosion resistance without anti-seize on m...

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NGK BR8HS-10 Spark Plug Stock # 1134

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NGK BR8HS-10 Spark Plug Stock # 1134NGK BR8HS-10 is listed in the supplied catalog as spark plugs: Spark Plug Stock # 1134.Product Details Brand: NGK Manufacturer Part Number: BR8HS-10 Product T...
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NGK BR8ES Spark Plug Stock 5422

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NGK BR8ES Spark Plug Stock 5422NGK BR8ES is listed in the supplied catalog as spark plugs: Spark Plug Stock 5422.Product Details Brand: NGK Manufacturer Part Number: BR8ES Product Type: Spark Pl...
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NGK BR8ECM Spark Plug Stock # 3035

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NGK BR8ECM Spark Plug Stock # 3035NGK BR8ECM is listed in the supplied catalog as spark plugs: Spark Plug Stock # 3035.Product Details Brand: NGK Manufacturer Part Number: BR8ECM Product Type: S...
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NGK BR10EIX Spark Plug Stock # 6801 (snowmobile)

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NGK BR10EIX Spark Plug Stock # 6801 (snowmobile)NGK BR10EIX is listed in the supplied catalog as spark plugs: Spark Plug Stock # 6801 (snowmobile).Product Details Brand: NGK Manufacturer Part Num...
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NGK U5104 COP Ignition Coil Stock # 48723

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NGK U5104 COP Ignition Coil Stock # 48723NGK U5104 is listed in the supplied catalog as ignition coils: COP Ignition Coil Stock # 48723.Product Details Brand: NGK Manufacturer Part Number: U5104 ...
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NGK U5051 COP Ignition Coil Stock # 48841

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NGK U5051 COP Ignition Coil Stock # 48841NGK U5051 is listed in the supplied catalog as ignition coils: COP Ignition Coil Stock # 48841.Product Details Brand: NGK Manufacturer Part Number: U5051 ...
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NGK U1175 Ignition Coil Stock # 49032

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NGK U1175 Ignition Coil Stock # 49032NGK U1175 is listed in the supplied catalog as ignition coils: Ignition Coil Stock # 49032.Product Details Brand: NGK Manufacturer Part Number: U1175 Product...
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NGK U1085 Ignition Coil Stock # 48633

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NGK U1085 Ignition Coil Stock # 48633NGK U1085 is listed in the supplied catalog as ignition coils: Ignition Coil Stock # 48633.Product Details Brand: NGK Manufacturer Part Number: U1085 Product...
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NGK R5724-8 V-power Racing Plug 7317

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NGK R5724-8 V-power Racing Plug 7317NGK R5724-8 is listed in the supplied catalog as spark plugs: V-power Racing Plug 7317.Product Details Brand: NGK Manufacturer Part Number: R5724-8 Product Ty...
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NGK R5674-8 V-power Racing Plug 5657

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NGK R5674-8 V-power Racing Plug 5657NGK R5674-8 is listed in the supplied catalog as spark plugs: V-power Racing Plug 5657.Product Details Brand: NGK Manufacturer Part Number: R5674-8 Product Ty...
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NGK PFR6G-11 Spark Plug Stock # 5555

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NGK PFR6G-11 Spark Plug Stock # 5555NGK PFR6G-11 is listed in the supplied catalog as spark plugs: Spark Plug Stock # 5555.Product Details Brand: NGK Manufacturer Part Number: PFR6G-11 Product T...
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NGK LFR6A-11 Spark Plug - Stock 3672

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NGK LFR6A-11 Spark Plug - Stock 3672NGK LFR6A-11 is listed in the supplied catalog as spark plugs: Spark Plug - Stock 3672.Product Details Brand: NGK Manufacturer Part Number: LFR6A-11 Product T...
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NGK IZFR6J Spark Plug Stock # 4462

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NGK IZFR6J Spark Plug Stock # 4462NGK IZFR6J is listed in the supplied catalog as spark plugs: Spark Plug Stock # 4462.Product Details Brand: NGK Manufacturer Part Number: IZFR6J Product Type: S...
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NGK IMR9E-9HES Spark Plug Stock # 7556

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NGK IMR9E-9HES Spark Plug Stock # 7556NGK IMR9E-9HES is listed in the supplied catalog as spark plugs: Spark Plug Stock # 7556.Product Details Brand: NGK Manufacturer Part Number: IMR9E-9HES Pro...
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NGK IFR6B Spark Plug Stock # 6507

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NGK IFR6B Spark Plug Stock # 6507NGK IFR6B is listed in the supplied catalog as spark plugs: Spark Plug Stock # 6507.Product Details Brand: NGK Manufacturer Part Number: IFR6B Product Type: Spar...
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NGK IFR5N10 Spark Plug Stock # 7866

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NGK IFR5N10 Spark Plug Stock # 7866NGK IFR5N10 is listed in the supplied catalog as spark plugs: Spark Plug Stock # 7866.Product Details Brand: NGK Manufacturer Part Number: IFR5N10 Product Type...