NGK Spark Plugs (2309 One Step Colder)

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Fitment Information: 2006-2014 Subaru WRX 2004-2021 Subaru STI 2005-2009 Subaru Legacy GT 2003-2008 Subaru Forester XT Features: Sold as a set of 4 spark plugs Trivalent metal plat ing provides superior anti-corrosion and anti-seizing properties Corrugated ribs prevent flashover Pure alumina silicate ceramic insulator, provides superior strength and better heat transfer Copper core aids in heat removal Triple seals prevent leakage Longevity: 50k Miles 60 Days manufacturer Warranty ShellSpark Plug Thread Diameter: 14mmThread Pitch: 1.25mmSeat Type: FlatReach: 26.5mm (1.04")Wrench Diameter: 5/8" (16mm)Terminal Type: SolidGap: .031" (0.8mm) Center ElectrodeElectrode Tip Material: IridiumElectrode Core Material: Copper Ground ElectrodeMaterial: NickelType: StandardShape: Taper Cut SpecificationsResistor: YesResistor Value: 5k OhmManufacturer Heat Range: 7Torque Specs: Cast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft. Show more