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 U5055 COP Ignition Coil Stock # 48705
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    NGK U5055 COP Ignition Coil Stock # 48705
    $40.99 USD
    $40.99 USD
    $40.99 USD
    NGK U5055 COP Ignition Coil Stock # 48705NGK U5055 is listed in the supplied catalog as ignition coils: COP Ignition Coil Stock # 48705.Product Details Brand: NGK Manufacturer Part Number: U5055 ...
  • NGK U5027 COP Ignition Coil Stock # 48668
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    NGK U5027 COP Ignition Coil Stock # 48668
    $83.99 USD
    $83.99 USD
    $83.99 USD
    NGK U5027 COP Ignition Coil Stock # 48668NGK U5027 is listed in the supplied catalog as ignition coils: COP Ignition Coil Stock # 48668.Product Details Brand: NGK Manufacturer Part Number: U5027 ...
  • NGK U2023 Ignition Coil Stock # 49001
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    NGK U2023 Ignition Coil Stock # 49001
    $61.99 USD
    $61.99 USD
    $61.99 USD
    NGK U2023 Ignition Coil Stock # 49001NGK U2023 is listed in the supplied catalog as ignition coils: Ignition Coil Stock # 49001.Product Details Brand: NGK Manufacturer Part Number: U2023 Product...
  • NGK TR5 V-power Plugs 2238
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    NGK TR5 V-power Plugs 2238
    $3.99 USD
    $3.99 USD
    $3.99 USD
    NGK TR5 V-power Plugs 2238NGK TR5 is listed in the supplied catalog as spark plugs: V-power Plugs 2238.Product Details Brand: NGK Manufacturer Part Number: TR5 Product Type: Spark Plugs Manufact...
  • NGK R5673-9 V-power Racing Plug 3442
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    NGK R5673-9 V-power Racing Plug 3442
    $5.99 USD
    $5.99 USD
    $5.99 USD
    NGK R5673-9 V-power Racing Plug 3442NGK R5673-9 is listed in the supplied catalog as spark plugs: V-power Racing Plug 3442.Product Details Brand: NGK Manufacturer Part Number: R5673-9 Product Ty...
  • NGK R5671A-8 V-power Racing Plug 4554 .750in Reach- Std Tip
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    NGK R5671A-8 V-power Racing Plug 4554 .750in Reach- Std Tip
    $6.99 USD
    $6.99 USD
    $6.99 USD
    NGK R5671A-8 V-power Racing Plug 4554 .750in Reach- Std TipNGK R5671A-8 is listed in the supplied catalog as spark plugs: V-power Racing Plug 4554 .750in Reach- Std Tip.Product Details Brand: NGK ...
  • NGK MR8AI9 Spark Plug Stock # 7692
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    NGK MR8AI9 Spark Plug Stock # 7692
    $12.99 USD
    $12.99 USD
    $12.99 USD
    NGK MR8AI9 Spark Plug Stock # 7692NGK MR8AI9 is listed in the supplied catalog as spark plugs: Spark Plug Stock # 7692.Product Details Brand: NGK Manufacturer Part Number: MR8AI9 Product Type: S...
  • NGK LKAR8AI-9 Spark Plug Stock # 6706
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    NGK LKAR8AI-9 Spark Plug Stock # 6706
    $17.99 USD
    $17.99 USD
    $17.99 USD
    NGK LKAR8AI-9 Spark Plug Stock # 6706NGK LKAR8AI-9 is listed in the supplied catalog as spark plugs: Spark Plug Stock # 6706.Product Details Brand: NGK Manufacturer Part Number: LKAR8AI-9 Produc...
  • NGK FR5GP Spark Plug Stock # 3284
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    NGK FR5GP Spark Plug Stock # 3284
    $4.99 USD
    $4.99 USD
    $4.99 USD
    NGK FR5GP Spark Plug Stock # 3284NGK FR5GP is listed in the supplied catalog as spark plugs: Spark Plug Stock # 3284.Product Details Brand: NGK Manufacturer Part Number: FR5GP Product Type: Spar...
  • NGK DPR5EA-9 Spark Plug Stock # 2887
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    NGK DPR5EA-9 Spark Plug Stock # 2887
    $3.99 USD
    $3.99 USD
    $3.99 USD
    NGK DPR5EA-9 Spark Plug Stock # 2887NGK DPR5EA-9 is listed in the supplied catalog as spark plugs: Spark Plug Stock # 2887.Product Details Brand: NGK Manufacturer Part Number: DPR5EA-9 Product T...
  • NGK CR7E Spark Plug Stock # 4578
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    NGK CR7E Spark Plug Stock # 4578
    $6.99 USD
    $6.99 USD
    $6.99 USD
    NGK CR7E Spark Plug Stock # 4578NGK CR7E is listed in the supplied catalog as spark plugs: Spark Plug Stock # 4578.Product Details Brand: NGK Manufacturer Part Number: CR7E Product Type: Spark P...
  • NGK CR6E Spark Plug Stock # 6965
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    NGK CR6E Spark Plug Stock # 6965
    $8.99 USD
    $8.99 USD
    $8.99 USD
    NGK CR6E Spark Plug Stock # 6965NGK CR6E is listed in the supplied catalog as spark plugs: Spark Plug Stock # 6965.Product Details Brand: NGK Manufacturer Part Number: CR6E Product Type: Spark P...
  • NGK CR5EH-9 Spark Plug Stock # 6689
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    NGK CR5EH-9 Spark Plug Stock # 6689
    $13.99 USD
    $13.99 USD
    $13.99 USD
    NGK CR5EH-9 Spark Plug Stock # 6689NGK CR5EH-9 is listed in the supplied catalog as spark plugs: Spark Plug Stock # 6689.Product Details Brand: NGK Manufacturer Part Number: CR5EH-9 Product Type...
  • NGK BUZ8H Spark Plug Stock # 7447 (marine)
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    NGK BUZ8H Spark Plug Stock # 7447 (marine)
    $10.99 USD
    $10.99 USD
    $10.99 USD
    NGK BUZ8H Spark Plug Stock # 7447 (marine)NGK BUZ8H is listed in the supplied catalog as spark plugs: Spark Plug Stock # 7447 (marine).Product Details Brand: NGK Manufacturer Part Number: BUZ8H ...
  • NGK BUE Spark Plug Stock # 2322
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    NGK BUE Spark Plug Stock # 2322
    $15.99 USD
    $15.99 USD
    $15.99 USD
    NGK BUE Spark Plug Stock # 2322NGK BUE is listed in the supplied catalog as spark plugs: Spark Plug Stock # 2322.Product Details Brand: NGK Manufacturer Part Number: BUE Product Type: Spark Plug...
  • NGK BU8H Spark Plug Stock 6431
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    NGK BU8H Spark Plug Stock 6431
    $5.99 USD
    $5.99 USD
    $5.99 USD
    NGK BU8H Spark Plug Stock 6431NGK BU8H is listed in the supplied catalog as spark plugs: Spark Plug Stock 6431.Product Details Brand: NGK Manufacturer Part Number: BU8H Product Type: Spark Plugs...

Showing 321 -336 of 361 items