Iridium spark plug DENSO

Six times harder than platinum, iridium withstands temperatures up to 4,000°F The iridium electrodes of these spark plugs can be reduced to only 0.4 mm, which lowers the required voltage and improves ignition performance. 360° laser welding of the electrode ensures a wear-resistant seal even under the most extreme conditions. Ground electrode with tapered cut and U-groove, creating a large volume for the flame center.