Spark Plugs

Spark plugs ignite the air-fuel mixture in your engine's cylinders, making them one of the most critical components for reliable starting, smooth idling, and optimal fuel efficiency. Whether you're performing routine maintenance, chasing an elusive misfire, or building a high-compression forced-induction engine, the right plug makes a measurable difference.

This collection brings together spark plugs for a wide range of applications, from daily-driven commuters to dedicated race cars. Use the filters to narrow by thread size, reach, and heat range, or browse by electrode material:

  • Copper – Excellent conductivity, ideal for older engines and performance applications where frequent changes are acceptable.
  • Platinum – Long service life and consistent performance, commonly specified for modern engines with high-energy ignition systems.
  • Iridium – Extremely hard, fine-wire center electrode reduces voltage requirements and extends change intervals, often found in late-model and high-output engines.
  • Double Platinum / Double Iridium – Enhanced durability for waste-spark ignition systems, with precious metal on both electrodes.

When selecting a plug, verify the manufacturer's recommended heat range and gap setting. A plug that's too cold may foul during low-speed driving, while one that's too hot can lead to pre-ignition and engine damage. All plugs in this collection meet or exceed OEM specifications for durability and performance, giving you confidence with every ignition cycle.

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NGK Standard LMAR8D-J Spark Plug Box of 10 showing nickel alloy electrode and trivalent metal plating.

$480.60

In stock
Box of 4 NGK Ruthenium HX LFR6BHX spark plugs showing fine wire center electrodes.

$130.16

In stock
Set of four NGK Racing R7448A-8 spark plugs showing the trivalent metal plating and corrugated ceramic insulators.

$95.84

In stock
Set of four NGK Laser Platinum PFR7AB spark plugs with white ceramic insulators and metal threaded terminals

$213.24

Low in stock
NGK Laser Platinum spark plug with white corrugated ceramic insulator and trivalent metal plating, box of 4

$143.36

In stock
Set of four NGK KR9E-G Standard spark plugs featuring white ceramic insulators and trivalent metal plated threads.

$83.00

In stock
Four NGK Laser Iridium LMAR9AI-10 spark plugs with iridium-tipped electrodes and trivalent metal-plated shells.

$153.16

In stock
A set of four NGK Iridium IX spark plugs (KR7DIX-11S) with fine-wire iridium tips and trivalent metal plating.

$90.60

Low in stock
NGK Laser Iridium spark plug DIMR8C10 with trivalent metal plating and laser-welded iridium electrode tip.

$211.88

Low in stock

$184.32

In stock
Set of 4 NGK Laser Iridium CR9EIB-9 spark plugs with iridium tips and trivalent metal plating.

$104.20

Low in stock
Set of four NGK Ruthenium HX spark plugs showing the 0.4mm ruthenium fine wire center electrode.

$130.16

Low in stock
Four NGK Laser Iridium LMAR8AI-8 spark plugs featuring iridium center electrodes and trivalent metal plating.

$146.64

In stock
Set of 4 NGK LMAR9G Standard spark plugs with white ceramic insulators and nickel alloy tips.

$102.68

In stock
Set of 4 NGK Laser Iridium DILKAR7B8 spark plugs featuring fine wire center electrodes and terminal nuts.

$188.36

In stock
NGK G-Power platinum spark plug ZFR6BGP-S showing fine wire center electrode and trapezoidal cut ground.

$48.00

Low in stock
Set of four NGK LZFR5C-11 nickel spark plugs with corrugated ceramic insulators and trivalent metal plating

$73.76

Low in stock
Set of 4 NGK Laser Iridium LZFR5CI-11 spark plugs featuring iridium center and platinum ground electrodes.

$99.88

In stock
Set of 4 NGK Iridium IX spark plugs CPR7EAIX-9 featuring the fine-wire iridium tip and trivalent metal plating.

$90.60

Low in stock
Set of four NGK R2556G-8 Iridium/Platinum racing spark plugs showing the threaded shells and specialized electrodes.

$438.52

In stock
Set of four NGK Laser Iridium DILFR7K9G spark plugs showing the iridium center tip and platinum ground electrode.

$188.00

Low in stock
Four NGK Laser Iridium LMAR8BI-9 spark plugs with fine-wire iridium tips and trivalent plating.

$153.16

In stock
NGK Laser Iridium High Ignitability spark plug DILKAR7Q8 showing the iridium center electrode and ceramic insulator

$200.72

Low in stock
NGK Laser Iridium High Ignitability spark plug with trivalent plating and iridium-tipped center electrode.

$200.80

In stock
Set of four NGK Ruthenium HX LKAR8BHX spark plugs with fine wire ruthenium and platinum electrodes.

$130.16

In stock

$192.40

In stock
Set of four NGK Laser Iridium DILKR8B6 spark plugs with white ceramic insulators and trivalent metal plating.

$201.56

In stock
Set of four NGK Laser Iridium ILTR5E11 spark plugs showing iridium-tipped electrodes and trivalent metal plating.

$105.64

In stock
Set of four NGK Laser Iridium MR8BI-8 spark plugs with iridium center electrodes and trivalent metal plating.

$147.68

In stock
NGK Ruthenium HX high ignitability spark plug with fine wire ruthenium and platinum electrodes.

$130.16

In stock

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