DENSO Introduces Innovative Iridium TT Spark Plug – UnderhoodService
Connect with us
Close Sidebar Panel Open Sidebar Panel


DENSO Introduces Innovative Iridium TT Spark Plug


DENSODENSO has unveiled a new line of spark plugs engineered to last more than 100,000 miles on the road, and provide more power and superior fuel economy. The new DENSO Iridium TT spark plug, with its unique Twin Tip Technology and patented design, delivers far less obstruction to the spark than standard plugs, allowing an omni-directional expansion of the ignition flame. Small electrode tips mean less spark interference and more complete combustion.


“With iridium overtaking platinum spark plugs as the new OEM standard, we knew the aftermarket needed a top-performing, high-value iridium replacement plug,” says Fran Labun, vice president, Sales Group, DENSO Products and Services Americas Inc. “The new DENSO Iridium TT spark plug is an innovative design that helps ensure complete combustion, even after many thousands of miles of use.”

The DENSO Iridium TT spark plug has the world’s smallest center electrode, a 0.4 mm needle tip, composed of a patented iridium-rhodium alloy that offers exceptional protection against corrosion and high-temperature oxidation. The ground electrode also has a needle tip – a 0.7 mm platinum needle that’s designed to resist oxidation and wear. These small electrode tips create less interference for the ignition flame to expand and fully complete the combustion process, according to DENSO.


The Iridium TT’s Twin Tips allow the spark plug to create the largest spark concentration and explosion, which translates into more power and superior fuel economy than other spark plugs.

DENSO noted that a wide variety of heat ranges is not necessary to cover the vast majority of North American vehicles. In fact, just 19 DENSO part numbers will cover 92 percent of vehicles on the road today. “That’s good news for everyone in the aftermarket, from wholesale distributors and jobbers to installers,” said Labun.

For more details, visit

Click to comment