What makes iridium spark plugs better than standard plugs?

Iridium is a much harder metal than platinum, allowing for a finer center electrode. This fine tip requires less voltage to ignite the fuel-air mixture, leading to a stronger, more consistent spark. This can result in improved acceleration and fuel efficiency.

Do these spark plugs come with anti-seize pre-applied?

These NGK Iridium IX spark plugs feature trivalent metal plating on the body, which helps prevent corrosion and seizing. It's still a good practice to apply a small amount of anti-seize compound to the threads during installation, especially on aluminum cylinder heads, to ensure easy removal in the future.

How many spark plugs are included in this box?

This is a box of four (4) NGK Iridium IX spark plugs. This quantity is suitable for many 4-cylinder, 6-cylinder, and 8-cylinder engines.

NGK Iridium IX Spark Plug (TR55-1IX)

Name: NGK Iridium IX Spark Plug (TR55-1IX)
Brand: NGK
SKU: ngk-ngk-iridium-ix-spark-plug-tr55-1ix-pa-ng7316
Price: 8.32 USD
Availability: InStock

$8.32

In Stock

NGK Iridium IX Spark Plug Box of 4 (TR55-1IX). Offers outstanding acceleration and high fuel efficiency.

Key Features

Fits a wide range of vehicles including Buick, Ford, and Lincoln models.
Features a fine iridium center electrode for durable and consistent spark.
Provides outstanding acceleration, high fuel efficiency, and durability.
Tapered cut ground electrode improves starting, idling, and throttle response.
Trivalent metal plating offers superior anti-corrosion and anti-seizing properties.
Designed for modified or high-performance applications as an upgrade to OE plugs.

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Product Details

NGK is known for making reliable ignition components, and their Iridium IX spark plugs are a popular choice for drivers looking to get more out of their engine. These plugs are designed to provide a more consistent and powerful spark, which can lead to improved acceleration and better fuel efficiency. If you're looking to upgrade from standard nickel alloy plugs, or if you have a modified vehicle, these are definitely worth considering.

The fine iridium tip on these plugs is incredibly durable, lasting much longer than platinum. This means you get a consistent spark over time, helping with starting, idling, and throttle response. The iridium alloy can also handle the higher temperatures found in many modern engines, making them a solid option for performance applications. Plus, the trivalent metal plating on the body helps prevent corrosion and makes them easier to remove later on.

This set includes four spark plugs, which is what many common V6 and V8 engines require. They fit a wide range of vehicles, including many Ford, Buick, and Lincoln models from the 80s through the 2000s.