NGK Iridium Spark Plug CR8EHIX-9 (3797), 4T, Honda

We also have special competition spark plugs, which have platinum and iridium electrodes.
They are especially recommended for highly tuned engines and when a rotor is installed. The spark is much more stable, especially at a high number of revolutions. In addition, the thinner electrode does not get sooted, unlike ordinary CU electrodes.
For High-End cylinders such as the MHR TEAM, Hebo Manston II, and the ProRace, we recommend NGK spark plugs with a value of 10 or 10.5.
Antiparasitic spark plugs should be installed especially when you have fitted a tachometer, as without these spark plugs the tachometer reacts with jumps in the number of revolutions.

 NGK IRIDIUM CR8EHIX-9 (3797) spark plug, 4T, Honda