NGK ILZKBR7B8G Iridium 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. BMW 135i (engine code N54B30) BMW 335i (engine code N54B30) Mini Cooper S & JCW (engine code N14B16 & N18B16) Citroën DS4 THP 200 (engine code EP6CDTX) Citroën DS5 THP 200 (engine code EP6CDTX) Peugeot 208 GTI (engine code EP6CDTX) Peugeot 308 GTI (engine code EP6CDTX) Peugeot 308CC THP 200 (engine code EP6CDTX) Peugeot RCZ THP (engine code EP6CDTX)