DENSO^® Spark Plugs

The DDIʼs key to long plug life

DENSO has launched the latest generation of hard-wearing spark plugs − the DENSO DOUBLE IRIDIUM (DDI) spark plug. DDI spark plug technology improves and extends the spark plugʼs lifespan and requires significantly less maintenance than competitor spark plugs. The DDI spark plug is particularly effective when used in biogas engines. Try DENSO DDI spark plugs today.

The SAVERʼs Key to Long Plug Life

DENSOʼs OEM expertise and commitment to innovation enables them to remain at the forefront of cutting-edge gas engine spark plug development. The unique and specialist technology used in the Iridium Saver and Iridium Saver Performer spark plugs range extends their lifespan, making them ideal for high-compression lean-burn engines. Iridium Saver and Iridium Performer spark plugs also help to maximise engine performance and deliver extra durability. Because they require minimal maintenance compared to standard plugs, Iridium Saver and Iridium Saver Performer spark plugs increase service interval times.

DENSO Spark Plugs are made to high quality standards and incorporate the very latest in spark plug technology. As one of the world’s largest suppliers DENSO continues to meet its high global standards through continuous improvements to its comprehensive product range.

In June 2022, MOTORTECH notified customers (Sales & Service Bulletin 115) DENSO had made a change to the material composition of the popular GE3-5 and GK3-5 spark plugs.

This change resulted in new part numbers being released for customer use. These part numbers were freely available between June 2022 and January 2024. With immediate effect DENSO has advised it will be returning to the standard GE3-5 and GK3-5 spark plugs that were on sale prior to June 2022. This change marks the return to the original double Iridium electrodes. The centre electrode has a diameter of 0.2 mm, the ground electrode has a diameter of 2.4 mm. The initial gap setting is 0.28 mm. The geometry of both part numbers will remain the same as their predecessors.

The new DENSO® spark plug GE2-3 was specially developed for use in state-of-the-art engine applications and, with its unique iridium alloy on the center and ground electrode, is ideally suited for operation with natural and special gases. The new designed, protruding ground electrode with copper core provides improved heat dissipation and reduces wear on the electrode base material, resulting in increased electrical and mechanical strength and service life. The longer insulator design also offers the best protection against flashovers.

General Features

Longer insulator design offers best flashover protection
Suppression of electromagnetic interference (EMI)
The ground electrode with copper core increases the electrical and mechanical load capacity
J-type electrode design for enhanced combustion
Advanced spark erosion resistance

For ROLLS ROYCE^®, WÄRTSILÄ^® and CATERPILLAR^® Gas Engines

The DENSO^® spark plug GI3-4, for years an exclusively made product for engine manufacturers like ROLLS ROYCE^®and WÄRTSILÄ^®, is now available for the gas engine aftermarket. Provided with all positive characteristics of the IRIDIUM SAVER PERFORMER family, the Cross Groove design, the 360° laser welding and iridium/platinum alloy on center and ground electrode, this spark plug type is one more DENSO^® product standing for high quality and long life.