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NGK DIFR5E11 / 91112 Iridium Ignition Spark Plug With 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 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.