A high heat value plug that is compatible with the M12 long reach size + electrode protruding type spark plugs that are often used in vehicles with direct injection turbo engines in sports vehicles such as Civic Type R (FK8) and Swift Sport (ZC33S).
We prepared NGK-equivalent heat values of 8 (XLZ only) and 9 so that you can feel a higher level of peace of mind when tuning light such as boost up.
In addition to the characteristics of the proven "SUPER FIRE RACING M series", the "MR series" center electrode is made of ruthenium alloy to further improve reliability.
