Moin her lover and on a good season for all of us! ?? I’m just in the service preparation for my 2014 lady and I came up with a question. As standard, the NGK LMAR9D-J will install a spark plug with nickel electrode. However, the NGK LMAR9AI-8 (Iridium) should also be compatible and bring some advantages, e.g. better ignition stability and longer service life. ?? Almost all dimensions are identical BUT: The standard candle has a 16 mm key width, The Iridium Ve rsion only 14 mm. ?? Now to the question: Does anyone have experience with this spark plug? Are there technical reasons why a 14 mm recording could be problematic e.g. regarding the sealing or heat dissipation? Or is it really only the key width that differs? Are I happy about your feedback! ?????