The DENSO IWF22 Iridium Spark Plug, manufacturer part number 5379 and vendor part number 5379, is engineered for dependable ignition performance in demanding automotive and powersports applications. Its iridium electrode material is exceptionally durable and withstands temperatures up to 4,000°F, helping the spark plug maintain reliable operation under high-heat conditions.
Feature: The fine 0.4 mm iridium center electrode reduces voltage requirements while promoting efficient, consistent firing. A 360-degree laser-welded electrode construction creates a durable seal designed to resist wear, even in severe operating environments. The ground electrode uses a tapered cut and U-groove design to create a larger flame-center area, supporting improved flame propagation and combustion performance.
The DENSO IWF22 is intended as a direct-fit replacement when the vehicle or equipment manufacturer specifies this plug model and heat range. Confirm fitment using the application catalog, owner’s manual, or existing spark plug specifications before installation. Proper fitment depends on the engine design, ignition system, and required plug characteristics. Install the DENSO IWF22 according to the manufacturer’s torque and service recommendations.
With its high-temperature iridium construction, reduced-voltage ignition design, and wear-resistant laser-welded electrode, the DENSO IWF22 provides a durable replacement solution for applications requiring part number 5379. It is suitable for maintaining consistent ignition performance and long service life when matched to the correct engine application.
Features:
- Iridium Electrode: Withstands temperatures up to 4,000°F for durable high-heat performance.
- Fine-Wire Center Electrode: The 0.4 mm iridium electrode helps reduce voltage requirements and improve firing performance.
- Laser-Welded Construction: A 360-degree laser weld helps seal the electrode and resist wear in severe conditions.
- Tapered Ground Electrode: Tapered-cut and U-groove design creates a larger flame-center area.
- Fitment: Direct-fit replacement for applications that specify the DENSO IWF22 spark plug and part number 5379; verify application requirements before installation.
- Brand and Part Number: DENSO IWF22, manufacturer and vendor part number 5379.