Fire a sharper, more consistent spark with the DENSO Iridium Power Spark Plug 5379. Built around the world's smallest 0.4mm iridium center electrode for improved spark toward more complete combustion, it drops in across a wide range of applications — from the 1956-1959 Porsche 356A [H4-1.6L] and 1970-1972 Volvo 1800 [L4-2.0L] to many Suzuki, Kawasaki, Yamaha, Polaris, Arctic Cat and other powersports models [All]. See the Buyer's Guide tab for the full list.
Fine-wire iridium tip: the world's smallest 0.4mm iridium center electrode helps deliver an improved spark for maximum combustion.
Ground electrode design: U-Groove and taper-cut ground electrode (Tapercut, U-Groove) to help maximize flame propagation; standard ground configuration with a single ground electrode.
Construction: iridium center electrode tip over a copper center core, with a nickel ground electrode core.
Specifications: 14.0mm thread diameter, 12.7mm reach, flat seat, 20.6mm hex, manufacturer heat range 22, 5000-ohm resistance, and a 0.8mm pre-gap.
Quantity used varies by application (the listed applications call for 1, 2, or 4). Minimum order quantity is 4. Country of origin: Japan.
Interchange: IWF22 · Manufacturer part number 5379
This part cross-references / interchanges with the following part numbers:
IWF22
Frequently Asked Questions
What makes the DENSO 5379 an Iridium Power plug?
It uses the world's smallest 0.4mm iridium center electrode with U-Groove and taper-cut ground electrodes, designed to deliver an improved spark for more complete combustion and to maximize flame propagation.
How many plugs do I need?
Quantity varies by application — the listed applications call for 1, 2, or 4 plugs. Check the Buyer's Guide tab for your vehicle. The minimum order quantity is 4.
What are the key specifications?
14.0mm thread diameter, 12.7mm reach, flat seat, 20.6mm hex, manufacturer heat range 22, 5000-ohm resistance, and a 0.8mm pre-gap. The center core is copper with an iridium tip; the ground core is nickel.
Is this a resistor spark plug?
Yes. The 5379 lists a resistance of 5000 ohms, which helps suppress radio-frequency interference from the ignition system.
What number does the DENSO 5379 interchange with?
It carries the interchange number IWF22. Its own identity is manufacturer part number 5379. Always confirm fitment for your specific vehicle using the Buyer's Guide tab.
Spark Plug StandardPatented U-Groove technology on the ground electrode allows for a larger flame front and improved ignitability. Copper core center electrode for superior thermal conductivity...
WARNING:
These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to
www.P65Warnings.ca.gov.
