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 TR6IX Spark Plug Stock # 3689
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    NGK TR6IX Spark Plug Stock # 3689
    $9.99 USD
    $9.99 USD
    $9.99 USD
    NGK TR6IX Spark Plug Stock # 3689NGK TR6IX is listed in the supplied catalog as spark plugs: Spark Plug Stock # 3689.Product Details Brand: NGK Manufacturer Part Number: TR6IX Product Type: Spar...
  • NGK TR55-1GP Spark Plug Stock # 7159
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    NGK TR55-1GP Spark Plug Stock # 7159
    $4.99 USD
    $4.99 USD
    $4.99 USD
    NGK TR55-1GP Spark Plug Stock # 7159NGK TR55-1GP is listed in the supplied catalog as spark plugs: Spark Plug Stock # 7159.Product Details Brand: NGK Manufacturer Part Number: TR55-1GP Product T...
  • NGK TR5-1 V-power Plugs 7060
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    NGK TR5-1 V-power Plugs 7060
    $3.99 USD
    $3.99 USD
    $3.99 USD
    NGK TR5-1 V-power Plugs 7060NGK TR5-1 is listed in the supplied catalog as spark plugs: V-power Plugs 7060.Product Details Brand: NGK Manufacturer Part Number: TR5-1 Product Type: Spark Plugs Ma...
  • NGK R5674-6 V-power Racing Plug 4449
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    NGK R5674-6 V-power Racing Plug 4449
    $8.99 USD
    $8.99 USD
    $8.99 USD
    NGK R5674-6 V-power Racing Plug 4449NGK R5674-6 is listed in the supplied catalog as spark plugs: V-power Racing Plug 4449.Product Details Brand: NGK Manufacturer Part Number: R5674-6 Product Ty...
  • NGK R5670-9 V-power Racing Plug 3913
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    NGK R5670-9 V-power Racing Plug 3913
    $7.99 USD
    $7.99 USD
    $7.99 USD
    NGK R5670-9 V-power Racing Plug 3913NGK R5670-9 is listed in the supplied catalog as spark plugs: V-power Racing Plug 3913.Product Details Brand: NGK Manufacturer Part Number: R5670-9 Product Ty...
  • NGK PTR5D-10 Spark Plug Stock # 3784
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    NGK PTR5D-10 Spark Plug Stock # 3784
    $10.99 USD
    $10.99 USD
    $10.99 USD
    NGK PTR5D-10 Spark Plug Stock # 3784NGK PTR5D-10 is listed in the supplied catalog as spark plugs: Spark Plug Stock # 3784.Product Details Brand: NGK Manufacturer Part Number: PTR5D-10 Product T...
  • NGK LKR8AP Spark Plug Stock # 4471
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    NGK LKR8AP Spark Plug Stock # 4471
    $11.99 USD
    $11.99 USD
    $11.99 USD
    NGK LKR8AP Spark Plug Stock # 4471NGK LKR8AP is listed in the supplied catalog as spark plugs: Spark Plug Stock # 4471.Product Details Brand: NGK Manufacturer Part Number: LKR8AP Product Type: S...
  • NGK IZTR5B11 Spark Plug Stock # 1465
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    NGK IZTR5B11 Spark Plug Stock # 1465
    $10.99 USD
    $10.99 USD
    $10.99 USD
    NGK IZTR5B11 Spark Plug Stock # 1465NGK IZTR5B11 is listed in the supplied catalog as spark plugs: Spark Plug Stock # 1465.Product Details Brand: NGK Manufacturer Part Number: IZTR5B11 Product T...
  • NGK IFR5L11 Spark Plug Stock # 6502
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    NGK IFR5L11 Spark Plug Stock # 6502
    $18.99 USD
    $18.99 USD
    $18.99 USD
    NGK IFR5L11 Spark Plug Stock # 6502NGK IFR5L11 is listed in the supplied catalog as spark plugs: Spark Plug Stock # 6502.Product Details Brand: NGK Manufacturer Part Number: IFR5L11 Product Type...
  • NGK FR4 V-power Plugs Stock 5155
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    NGK FR4 V-power Plugs Stock 5155
    $3.99 USD
    $3.99 USD
    $3.99 USD
    NGK FR4 V-power Plugs Stock 5155NGK FR4 is listed in the supplied catalog as spark plugs: V-power Plugs Stock 5155.Product Details Brand: NGK Manufacturer Part Number: FR4 Product Type: Spark Pl...
  • NGK BR6ES Spark Plug Stock 4922
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    NGK BR6ES Spark Plug Stock 4922
    $3.99 USD
    $3.99 USD
    $3.99 USD
    NGK BR6ES Spark Plug Stock 4922NGK BR6ES is listed in the supplied catalog as spark plugs: Spark Plug Stock 4922.Product Details Brand: NGK Manufacturer Part Number: BR6ES Product Type: Spark Pl...
  • NGK BR6EF Spark Plug Stock # 3177
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    NGK BR6EF Spark Plug Stock # 3177
    $3.99 USD
    $3.99 USD
    $3.99 USD
    NGK BR6EF Spark Plug Stock # 3177NGK BR6EF is listed in the supplied catalog as spark plugs: Spark Plug Stock # 3177.Product Details Brand: NGK Manufacturer Part Number: BR6EF Product Type: Spar...
  • NGK BKR6EY Spark Plug Stock # 3696
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    NGK BKR6EY Spark Plug Stock # 3696
    $3.99 USD
    $3.99 USD
    $3.99 USD
    NGK BKR6EY Spark Plug Stock # 3696NGK BKR6EY is listed in the supplied catalog as spark plugs: Spark Plug Stock # 3696.Product Details Brand: NGK Manufacturer Part Number: BKR6EY Product Type: S...
  • NGK BKR5E-11 Spark Plug Stock # 6953
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    NGK BKR5E-11 Spark Plug Stock # 6953
    $3.99 USD
    $3.99 USD
    $3.99 USD
    NGK BKR5E-11 Spark Plug Stock # 6953NGK BKR5E-11 is listed in the supplied catalog as spark plugs: Spark Plug Stock # 6953.Product Details Brand: NGK Manufacturer Part Number: BKR5E-11 Product T...
  • NGK BCPR6ES-11 Spark Plug Stock # 6779
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    NGK BCPR6ES-11 Spark Plug Stock # 6779
    $2.99 USD
    $2.99 USD
    $2.99 USD
    NGK BCPR6ES-11 Spark Plug Stock # 6779NGK BCPR6ES-11 is listed in the supplied catalog as spark plugs: Spark Plug Stock # 6779.Product Details Brand: NGK Manufacturer Part Number: BCPR6ES-11 Pro...
  • NGK U5150 COP Ignition Coil Stock # 48717
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    NGK U5150 COP Ignition Coil Stock # 48717
    $31.99 USD
    $31.99 USD
    $31.99 USD
    NGK U5150 COP Ignition Coil Stock # 48717NGK U5150 is listed in the supplied catalog as ignition coils: COP Ignition Coil Stock # 48717.Product Details Brand: NGK Manufacturer Part Number: U5150 ...

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