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NGK ILNAR8B7G / 91970 Iridium Ignition Spark PlugWith the smallest tip diameter available, OE Iridium spark plugs provide superior ignitability and long service life. The iridium/platinum surfaces ensure a slow wear rate, providing stable idle and superior anti-fouling. Laser-welded iridium center electrode tip Trivalent metal plating for superior anti-corrosion and anti-seizing Faster starts and quicker acceleration Better fuel economy and lower emissions OEM-approved designITEM SPECIFICS:Spanner Size : 14 mmThread Length : 25.0 mmMaterial : IridiumInterference Suppression : 5 kOhmIf 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.