Ignitions and Electrical› Ignition Components

NGK

NGK Iridium IX Spark Plug Box of 4 (CR8EIX)

$10.23

SKU: N003 4218

In Stock
In Stock
Ships by Jul 30
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The NGK 4218 is an Iridium IX spark plug designed for performance enthusiasts. It features a fine wire center electrode for durability and a stable spark, with an iridium alloy center electrode that has an extremely high melting point. The plug includes trivalent metal plating for superior anti-corrosion and anti-seizing properties, corrugated ribs to prevent flashover, a pure alumina silicate ceramic insulator for strength and heat transfer, and triple seals to prevent leakage.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandNGK
Part NumberN003 4218

Videos

How Long do NGK Iridium Spark Plugs Last? - A 100k Mile Review

How Long do NGK Iridium Spark Plugs Last? - A 100k Mile Review
Cheaper NGK Platinum Plugs vs Expensive Laser Iridium Spark Plugs - For Honda Vehicles

Cheaper NGK Platinum Plugs vs Expensive Laser Iridium Spark Plugs - For Honda Vehicles
Ruthenium VS Iridium Spark Plugs, NGK said Ruthenium = no advantage EXCEPT Maybe? Denso Replacements

Ruthenium VS Iridium Spark Plugs, NGK said Ruthenium = no advantage EXCEPT Maybe? Denso Replacements
Real vs Fake NGK Sparkplugs!

Real vs Fake NGK Sparkplugs!
NGK Iridium Spark Plugs at 100,000 Miles

NGK Iridium Spark Plugs at 100,000 Miles
NGK IZFR6K11: Tips to Check for Authentic Spark Plugs

NGK IZFR6K11: Tips to Check for Authentic Spark Plugs
NGK vs Bosch Spark Plugs: Which One Is Best for Your Engine?

NGK vs Bosch Spark Plugs: Which One Is Best for Your Engine?
Fake NGK Iridium Spark Plugs | How To Test!!

Fake NGK Iridium Spark Plugs | How To Test!!
Why NGK Iridium Spark Plugs ?

Why NGK Iridium Spark Plugs ?
How to Spot Fake NGK IZFR6K11 Laser Iridium Spark Plugs

How to Spot Fake NGK IZFR6K11 Laser Iridium Spark Plugs

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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