top of page


Denso is a worldwide leader in spark plug manufacturing. With an impressive automotive spark plug program, Denso also offers the industrial Iridium Saver line. Denso was established in December 1949. With around 86.000 employees and an annual sales around US$ 18.1 billion it is ranking in 4th place on 2000 Global OEM Automotive Parts Sales. The company is developing and manufacturing products mainly for the automotive industry in various branches like Communication, Environmental & Industrial, Systems Products, Thermal Systems, Power train Control Systems, Electronic- and Electric systems. DENSO is one of the world’s leading innovators and manufacturers of ignition technology, including spark plugs. Denso was the first company to produce long-life automotive Iridium Spark Plugs, and invented the world’s smallest, most efficient 0.4mm Iridium tip.

Hatraco is authorized European distributor from the very beginning for the Iridium Saver plug line containing a small program of technically highly advanced M18 and M14 spark plugs for use in heavy duty industrial, reciprocating gas engines.

An outclassing list of industrial plugs

DENSO has also developed Iridium Co-Generation Spark Plugs – a unique range of robust, high performing Iridium spark plugs especially for the gas engine industry. Iridium Co-Generation Spark Plugs combine all the performance benefits of DENSO’s Iridium Spark Plug technology with a number of additional efficiency advantages. Choose from Iridium Saver, Iridium Saver Performer and the latest Iridium Saver DDI. The Denso Iridium saver spark plug program consists of is a limited number of spark plugs but each of an outstanding product quality.

DENSO Iridium Saver Spark Plugs are a range of high efficiency, long-life spark plugs for gas engines that use Iridium technology to increase plug life and performance. The term ‘Saver’ implies the reduction in maintenance costs achieved by the extended plug life in high pressure, lean-burn engines.

Spark plug series

Iridium Saver Performer
GI3-1, GL3-1 and the GT3-1, M18 Iridium Saver Performer. With a iridium/platinum electrode configuration and a unique center electrode cross groove. 

Iridium Saver
GE3-1 GE5-1 GE3-5 GN3-1 (M18) and GI3-3, GL3-3 (M14). This spark plug range is furnished with an Iridium/Platinum electrode configuration like the Performer line, just without the center electrode groove.

Iridium Saver DDI
GE3-5, GK3-5 (M14) and GI3-5, GL3-5 (M18). This is the latest series of the Iridium Saver line and contains a set of spark plugs that have a double iridium electrode configuration for supreme resistance against electrode wear. Typically designed for highly corrosive gases like biogas, sewage gas and  waste disposal gas.

bottom of page