What is the main benefit of the iridium tip on these spark plugs?

The iridium tip on the center electrode is significantly harder than platinum, offering much greater durability. This means the spark plug can maintain a consistent and stable spark for a longer period, leading to better performance and longevity.

Why do these spark plugs have a platinum pad on the ground electrode?

The platinum pad on the ground electrode helps to ensure even wear over time, especially in modern vehicles with distributorless ignition systems. This contributes to maintaining optimal spark performance throughout the plug's lifespan.

What does the copper core in the spark plug insulator do?

The pure copper core within the ceramic insulator aids in heat removal from the spark plug tip. This helps prevent the plug from overheating, which is crucial for maintaining consistent performance and preventing pre-ignition.

NGK 94201 Laser Iridium Spark Plug Box of 4

Name: NGK Laser Iridium Spark Plug Box of 4 (SILZKGR8B8S)
Brand: NGK
Price: 18.42 USD
Availability: InStock

NGK Laser Iridium Spark Plug Box of 4 (SILZKGR8B8S)

$18.42

In Stock

NGK Laser Iridium Spark Plug Box of 4 (SILZKGR8B8S). Features a durable iridium-tipped center electrode for consistent spark.

Key Features

This product is a box of 4 NGK Laser Iridium spark plugs.
The center electrode features an iridium tip for enhanced durability and consistent spark.
A platinum pad on the ground electrode promotes even wear in distributorless ignition systems.
Pure alumina silicate ceramic insulator offers superior strength and heat transfer.
Trivalent metal plating provides anti-corrosion and anti-seizing properties.
A pure copper core helps dissipate heat, preventing the spark plug from overheating.

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Will this fit your vehicle?

Product Details

This is a box of four NGK Laser Iridium spark plugs, part number 94201. These are designed as direct OE replacements, meaning they match the original equipment specifications for a wide range of vehicles. The center electrode is tipped with iridium, a very hard metal that offers excellent durability and a stable spark, lasting significantly longer than platinum. The ground electrode also has a platinum pad, which helps ensure even wear, especially in modern distributorless ignition systems. NGK uses a pure alumina silicate ceramic insulator for strength and good heat transfer, and their pure copper core helps prevent the plug from overheating. The trivalent metal plating on the plug body helps resist corrosion and makes installation and removal easier, reducing the chance of seizing.

These plugs are a solid choice if your vehicle came with iridium-tipped spark plugs from the factory. The fine wire design of the center electrode is key to maintaining a consistent spark, which is important for efficient combustion and reliable starting. The high melting point of iridium makes these plugs well-suited for today's high-performance engines. They are built with triple seals to prevent any gas leakage, ensuring proper operation.