Bosch 0242140555 / VR6NII352U Double Iridium Spark Plug Petrol Ignition Part Equipped with iridium firing pins at the centre & ground electrode: Bosch Double-Iridium spark plugs are developed to the same high quality as original equipment & engineered for high performance in gasoline engines. Developed with the same high quality which we supply to original equipment: Outstanding spark plug technology which meets exactly the requirements of the respective engine Fine wire 360&176; continuous laser welded platinum firing pins & a yttrium enhanced tapered platinum ground electrode inlay: For enhanced combustion & service life Ribbed insulator design: Prevents misfires due to flash-over Large copper core center electrode: Enables an enhanced heat transfer Item Specifics: Electrode Material: Double Iridium Short Code: VR6NII352 U Gap: 1 mm Thread: M14 Thread Length: 26.5 mm Hex Size: 14 mm Number of Electrodes: 1OE Numbers: 12290-5A2-A02