NGK SILZNAR6D9 / 94051 Iridium Ignition Spark Plug With the smallest tip diameter available, OE Iridium spark plugs provide superior ignitability & long service life. The iridium/platinum surfaces ensure a slow wear rate, providing stable idle & superior anti-fouling. Laser-welded iridium center electrode tip Trivalent metal plating for superior anti-corrosion & anti-seizing Faster starts & quicker acceleration Better fuel economy & lower emissions OEM-approved design ITEM SPECIFICS: Spanner Size: 14 mm Thread Length: 25.0 mm Material: Iridium Interference Suppression: 5 k Ohm If you are unsure as to whether this is the correct part for your vehicle, please don't hesitate to contact us. Alternatively please use the cross reference table above.