What makes iridium spark plugs different from platinum?

Iridium is a much harder metal than platinum and has a higher melting point. This allows for a finer wire center electrode, which requires less voltage to fire and creates a more stable spark. The increased hardness also contributes to longer plug life.

Do these spark plugs come pre-gapped?

These NGK Laser Iridium spark plugs are designed to be OE replacements and typically come pre-gapped to the manufacturer's specification. However, it's always a good practice to check the gap before installation to ensure it matches your vehicle's requirements.

What does the trivalent metal plating do?

The trivalent metal plating on the spark plug threads helps prevent corrosion and makes the plug easier to remove later on. This reduces the risk of the plug seizing in the cylinder head, which can be a common issue with older or neglected plugs.

NGK Spark Plugs Laser Iridium 7692

Name: NGK Laser Iridium Spark Plug Box of 4 (MR8AI9)
Brand: NGK
Price: 9.58 USD
Availability: InStock

NGK Laser Iridium Spark Plug Box of 4 (MR8AI9)

$9.58

Only 5 left in stock

NGK Laser Iridium spark plugs offer improved performance and longevity with a fine wire iridium center electrode. Box of 4.

Key Features

Fits a wide range of Arctic Cat vehicles.
Fine wire center electrode made from iridium alloy for durability and stable spark.
Pure alumina silicate ceramic insulator provides superior strength and heat transfer.
Trivalent metal plating offers excellent anti-corrosion and anti-seizing properties.
Platinum pad on the ground electrode ensures even wear in distributorless ignition systems.
Copper core aids in heat removal from the plug.

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Product Details

The fine wire center electrode on these NGK Laser Iridium spark plugs is made from an iridium alloy, which has a very high melting point. This design helps ensure a stable spark and offers durability for modern engines. These plugs are designed as an OE or equivalent replacement, meaning they meet the original equipment specifications for the vehicles they fit.

NGK uses a pure alumina silicate ceramic insulator for superior strength and better heat transfer, helping to prevent overheating. The trivalent metal plating on the exterior provides good resistance to corrosion and makes them easier to install without seizing. For vehicles with distributorless ignition systems, most of these plugs also feature a platinum pad on the ground electrode for even wear. This set includes four spark plugs, suitable for many multi-cylinder engines.

These NGK Laser Iridium spark plugs are a solid option for a wide range of Arctic Cat snowmobiles, including models like the Bearcat 5000 XT and ZR 9000. They are recommended for vehicles that originally came with fine wire iridium alloy plugs.