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 DR8HS Spark Plug Stock # 5123
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    NGK DR8HS Spark Plug Stock # 5123
    $3.99 USD
    $3.99 USD
    $3.99 USD
    NGK DR8HS Spark Plug Stock # 5123NGK DR8HS is listed in the supplied catalog as spark plugs: Spark Plug Stock # 5123.Product Details Brand: NGK Manufacturer Part Number: DR8HS Product Type: Spar...
  • NGK DCPR6E Spark Plug Stock # 3481
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    NGK DCPR6E Spark Plug Stock # 3481
    $5.99 USD
    $5.99 USD
    $5.99 USD
    NGK DCPR6E Spark Plug Stock # 3481NGK DCPR6E is listed in the supplied catalog as spark plugs: Spark Plug Stock # 3481.Product Details Brand: NGK Manufacturer Part Number: DCPR6E Product Type: S...
  • NGK CMR5H Spark Plug Stock # 7599
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    NGK CMR5H Spark Plug Stock # 7599
    $5.99 USD
    $5.99 USD
    $5.99 USD
    NGK CMR5H Spark Plug Stock # 7599NGK CMR5H is listed in the supplied catalog as spark plugs: Spark Plug Stock # 7599.Product Details Brand: NGK Manufacturer Part Number: CMR5H Product Type: Spar...
  • NGK C7HSA Spark Plug Stock # 4629
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    NGK C7HSA Spark Plug Stock # 4629
    $3.99 USD
    $3.99 USD
    $3.99 USD
    NGK C7HSA Spark Plug Stock # 4629NGK C7HSA is listed in the supplied catalog as spark plugs: Spark Plug Stock # 4629.Product Details Brand: NGK Manufacturer Part Number: C7HSA Product Type: Spar...
  • NGK BPR7HS-10 Spark Plug Stock # 1092
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    NGK BPR7HS-10 Spark Plug Stock # 1092
    $2.99 USD
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    NGK BPR7HS-10 Spark Plug Stock # 1092NGK BPR7HS-10 is listed in the supplied catalog as spark plugs: Spark Plug Stock # 1092.Product Details Brand: NGK Manufacturer Part Number: BPR7HS-10 Produc...
  • NGK BPR6HS-10 Spark Plug Stock # 2633
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    NGK BPR6HS-10 Spark Plug Stock # 2633
    $4.99 USD
    $4.99 USD
    $4.99 USD
    NGK BPR6HS-10 Spark Plug Stock # 2633NGK BPR6HS-10 is listed in the supplied catalog as spark plugs: Spark Plug Stock # 2633.Product Details Brand: NGK Manufacturer Part Number: BPR6HS-10 Produc...
  • NGK B9EFS Spark Plug Stock # 1085
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    NGK B9EFS Spark Plug Stock # 1085
    $3.99 USD
    $3.99 USD
    $3.99 USD
    NGK B9EFS Spark Plug Stock # 1085NGK B9EFS is listed in the supplied catalog as spark plugs: Spark Plug Stock # 1085.Product Details Brand: NGK Manufacturer Part Number: B9EFS Product Type: Spar...
  • NGK ZFR5FIX-11 Spark Plug Stock # 2477
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    NGK ZFR5FIX-11 Spark Plug Stock # 2477
    $9.99 USD
    $9.99 USD
    $9.99 USD
    NGK ZFR5FIX-11 Spark Plug Stock # 2477NGK ZFR5FIX-11 is listed in the supplied catalog as spark plugs: Spark Plug Stock # 2477.Product Details Brand: NGK Manufacturer Part Number: ZFR5FIX-11 Pro...
  • NGK DPR9EIX-9 Spark Plug Stock 5545
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    NGK DPR9EIX-9 Spark Plug Stock 5545
    $12.99 USD
    $12.99 USD
    $12.99 USD
    NGK DPR9EIX-9 Spark Plug Stock 5545NGK DPR9EIX-9 is listed in the supplied catalog as spark plugs: Spark Plug Stock 5545.Product Details Brand: NGK Manufacturer Part Number: DPR9EIX-9 Product Ty...

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