The NGK Spark Plugs Iridium IX CR9EIX spark plug is engineered for dependable ignition, efficient combustion, and long-lasting performance. Designed with a fine iridium center electrode, this spark plug requires less voltage to produce a strong spark than conventional designs. The reduced voltage demand can help support consistent ignition performance while reducing strain on ignition system components.
The iridium electrode is approximately 25% smaller than a platinum electrode and about one-quarter the size of a conventional nickel electrode. This ultra-fine design promotes focused spark formation and reliable combustion across a wide range of operating conditions. The updated metal shell plating also provides enhanced resistance to corrosion, helping the plug maintain its durability in demanding engine environments.
Use the NGK Spark Plugs Iridium IX CR9EIX, manufacturer part number 3521, as a direct replacement when your application specifies this heat range, thread pattern, and plug design. Fitment should be verified against the vehicle, engine, equipment, and original spark plug specifications before installation. This product is supplied by NGK Spark Plugs and is intended for applications requiring the CR9EIX model.
Features:
- Fine iridium center electrode helps deliver reliable ignition and efficient combustion
- Ultra-small electrode design reduces voltage requirements and may extend ignition system life
- Iridium electrode is approximately 25% smaller than a platinum electrode
- Electrode is about one-quarter the size of a conventional nickel electrode
- Enhanced metal shell plating improves resistance to corrosion
- Brand: NGK Spark Plugs
- Model: Iridium IX CR9EIX
- Manufacturer part number: 3521
- Vendor part number: 3521