NGK DILKAR8A8 Iridium Spark Plug SpecificationsWhatever 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 useCompatible withNon-exhaustive list.Nissan GT-R (VR38DETT engine all versions)