NGK Iridium Laser ILZKAR8H8S Spark Plug Specifications Whatever your use or engine set-up the correct choice of spark plug is very important. Iridium is very heavy and dense metal ensuring that NGK spark plugs have a longer lifespan than OEM ones withstanding more than 100.000 km in standard use Compatible with Non-exhaustive list. Honda Civic Type R FK2 Honda Civic Type R FK8