NGK 4901 Iridium Racing Evo 9 One Step Colder Spark Plug | 2006 Mitsubishi Evo 9 (R7437-8)

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NGK Iridium Racing Evo 9 One Step Colder Spark Plug

The next generation of spark plugs. NGK is a pioneer in Iridium Spark Plug designer and manufacturer- More Durability and a Higher- Melting Point Than Platinum- Better Center Electrode Anti-Oxidation and Anti-Erosion- Improved Ignition- Superior Anti-Fouling- Lower Required Voltage

Please Note:

  • ALL PLUGS SOLD INDIVIDUALLY. Price is for one spark plug.


  • Fine Wire Center Electrode Ensures High Durability and a Consistently Stable Spark
  • Iridium Alloy has an Extremely High Melting Point, Perfect for Today's High-Tech, High Performance Engines
  • Trivalent Metal Plating Provides Superior Anti-Corrosion and Anti-Seizing Properties
  • Corrugated Ribs Prevent Flashover
  • Pure Alumina Silicate Ceramic Insulator, Provides Superior Strength and Better Heat Transfer
  • Copper Core Aids in Heat Removal
  • Triple Seals Prevent Leakage


  • 2006 Mitsubishi Evo 9

What's in the box?

  • (1) NGK Iridium Racing Evo 9 One Step Colder Spark Plug

Customer Reviews

Based on 3 reviews
Rodolf Reyes
Must have

This was recommended by my tuner since I live in colder climates and running E85. Night and day difference from stock plugs.

NGK 4901 Iridium Racing Spark Plugs

Best spark plugs out there for your evo. Highly recommend!

Brian smith

These plugs made a huge difference in my performance