U-groove, one of the most important features of Denso plugs is the patented U-shaped tip. The design of the tip gives the spark more space, which enables a more efficient spark. The spark is both hotter and wider resulting in a more complete combustion event Patented U-groove, simply better ignition power. The U-groove has two sharp corners instead of a flat surface. Better fuel economy. Thanks to the U-groove, the engine can run efficiently with a leaner engine, reducing the risk of misfires. The U-groove enables a larger space between the tips, while still maintaining the same tip spacing, in other words, lower emissions.
- The insulator is made of pure, highly insulating and strong aluminum powder, which also has high thermal conductivity.
- The five-groove structure of Denso plugs increases performance, especially in damp and dusty conditions. The design also provides 20% better insulation than traditional plugs and at the same time prevents misfires and reduces voltage drops.
- The copper-glass insulator connects the center electrode and the insulator together, acting as a gas-tight insulator. This insulator has a high electrical and thermal conductivity and serves as a heat distributor. In addition, it prevents gases from the combustion chamber from entering further.
- The structure of the central electrode guarantees a wide operating temperature range and provides effective protection against overheating. The central electrode is made of wear-resistant nickel/chromium metal alloy, with a copper core embedded in the middle.
