Utilizing decades of experience developing the world's leading spark plugs, the Iridium TT draws from the best features of the DENSO family of spark plugs, giving you more power in a more versatile plug.
Engineered with the smallest tip in the market, the DENSO Iridium TT spark plug delivers more complete combustion, giving you superior fuel economy over any other plug. Unparalleled, the Iridium TT is designed to last beyond 100,000 miles - providing coverage for most makes and models on the road today.
Twin Tip Technology delivering an omni-directional explosion for better combustion
0.4-millimeter center electrode - the smallest available today for better fuel economy
The most durable alloy of Iridium and Rhodium, resisting wear for over 100,000 miles
- 360-degree laser welding, allowing superior ignition and fuel economy