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 CPR8E Spark Plug Stock # 7411

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NGK CPR8E Spark Plug Stock # 7411NGK CPR8E is listed in the supplied catalog as spark plugs: Spark Plug Stock # 7411.Product Details Brand: NGK Manufacturer Part Number: CPR8E Product Type: Spar...
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NGK BR7HS-10 Spark Plug Stock # 1098

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NGK BR7HS-10 Spark Plug Stock # 1098NGK BR7HS-10 is listed in the supplied catalog as spark plugs: Spark Plug Stock # 1098.Product Details Brand: NGK Manufacturer Part Number: BR7HS-10 Product T...
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NGK BR6S Spark Plug - Each # 3522

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NGK BR6S Spark Plug - Each # 3522NGK BR6S is listed in the supplied catalog as spark plugs: Spark Plug - Each # 3522.Product Details Brand: NGK Manufacturer Part Number: BR6S Product Type: Spark...
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NGK BKR7EIX Spark Plug Stock # 2667

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NGK BKR7EIX Spark Plug Stock # 2667NGK BKR7EIX is listed in the supplied catalog as spark plugs: Spark Plug Stock # 2667.Product Details Brand: NGK Manufacturer Part Number: BKR7EIX Product Type...
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NGK BKR5E Spark Plug Stock 7938

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NGK BKR5E Spark Plug Stock 7938NGK BKR5E is listed in the supplied catalog as spark plugs: Spark Plug Stock 7938.Product Details Brand: NGK Manufacturer Part Number: BKR5E Product Type: Spark Pl...
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NGK UR4 V-power Plugs 6630

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NGK UR4 V-power Plugs 6630NGK UR4 is listed in the supplied catalog as spark plugs: V-power Plugs 6630.Product Details Brand: NGK Manufacturer Part Number: UR4 Product Type: Spark Plugs Manufact...
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NGK U5099 COP Ignition Coil Stock # 48922

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NGK U5099 COP Ignition Coil Stock # 48922NGK U5099 is listed in the supplied catalog as ignition coils: COP Ignition Coil Stock # 48922.Product Details Brand: NGK Manufacturer Part Number: U5099 ...
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NGK TR5AHX Spark Plug Stock # 94567

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NGK TR5AHX Spark Plug Stock # 94567NGK TR5AHX is listed in the supplied catalog as spark plugs: Spark Plug Stock # 94567.Product Details Brand: NGK Manufacturer Part Number: TR5AHX Product Type:...
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NGK TR55IX Spark Plug Stock #7164

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NGK TR55IX Spark Plug Stock #7164NGK TR55IX is listed in the supplied catalog as spark plugs: Spark Plug Stock #7164.Product Details Brand: NGK Manufacturer Part Number: TR55IX Product Type: Spa...
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NGK R5673-8 V-power Racing Plug 3249

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NGK R5673-8 V-power Racing Plug 3249NGK R5673-8 is listed in the supplied catalog as spark plugs: V-power Racing Plug 3249.Product Details Brand: NGK Manufacturer Part Number: R5673-8 Product Ty...
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NGK PFR7S8EG Spark Plug Stock # 1675

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NGK PFR7S8EG Spark Plug Stock # 1675NGK PFR7S8EG is listed in the supplied catalog as spark plugs: Spark Plug Stock # 1675.Product Details Brand: NGK Manufacturer Part Number: PFR7S8EG Product T...
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NGK LZKAR7A Spark Plug Stock # 6799

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NGK LZKAR7A Spark Plug Stock # 6799NGK LZKAR7A is listed in the supplied catalog as spark plugs: Spark Plug Stock # 6799.Product Details Brand: NGK Manufacturer Part Number: LZKAR7A Product Type...
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NGK LTR5GP Spark Plug Stock # 5019

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NGK LTR5GP Spark Plug Stock # 5019NGK LTR5GP is listed in the supplied catalog as spark plugs: Spark Plug Stock # 5019.Product Details Brand: NGK Manufacturer Part Number: LTR5GP Product Type: S...
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NGK LR8B Spark Plug Stock # 6208

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NGK LR8B Spark Plug Stock # 6208NGK LR8B is listed in the supplied catalog as spark plugs: Spark Plug Stock # 6208.Product Details Brand: NGK Manufacturer Part Number: LR8B Product Type: Spark P...
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NGK GR5 V-power Plugs Stock 2851

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NGK GR5 V-power Plugs Stock 2851NGK GR5 is listed in the supplied catalog as spark plugs: V-power Plugs Stock 2851.Product Details Brand: NGK Manufacturer Part Number: GR5 Product Type: Spark Pl...
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NGK FR5AP-11 Spark Plug Stock # 5463

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NGK FR5AP-11 Spark Plug Stock # 5463NGK FR5AP-11 is listed in the supplied catalog as spark plugs: Spark Plug Stock # 5463.Product Details Brand: NGK Manufacturer Part Number: FR5AP-11 Product T...