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Iridium IX Spark Plug (93501) by NGK. Designed for performance enthusiasts who want extreme ignitability, improved throttle response and superior anti-fouling, these spark plugs are a great option for modified engines and appropriate replacement for OE spark plugs, where recommended. With a 0.6 mm laser welded iridium tip and taper cut ground electrode, these plugs provide more area for flame expansion for quicker starts, improved performance, and better efficiency.
Designed for outstanding acceleration, high fuel efficiency, and durabilityEnsure a consistently stable sparkExtremely high melting point, perfect for todays high-tech, high-performance enginesExtremely resistant to heat, corrosion and electrical wearMatch OE fit and quality0.6 mm laser welded iridium tipTapered ground electrodeManufactured using triple-gasket sealing process to prevent leakage through the shellAlumina silicate insulator for strength and optimal heat transferCold-rolled threads for easier removal and installationCorrugated ribs eliminate misfire causing flashoverTrivalent metal platingLast 40 to 50 thousand miles
The products are adequately protected from combustion gas leaking through the shell thanks to triple-gasket sealing, while most other spark plugs on the market feature only two seals. The spark plugs also feature the alumina silicate insulator that is virtually pure to insure dielectric and physical strength, as well as heat transfer away from the tip for maximum performance. To eliminate flash over, which can cause misfiring, these products are built with corrugated ribs and feature cold-rolled threads to prevent damage to the cylinder head and make installation and removal easier. The products also feature trivalent metal plating for superior anti-corrosion and anti-seizing properties.Starting with a single product in 1936, NGK became the world leader in innovation, technology, and premium quality in the manufacture of spark plugs for virtually every automotive manufacturer in the world. NGK`s extraordinary growth can be attributed to a philosophy of manufacturing the product where it is going to be used, which means a substantial number of products sold in the USA are made in America. One of the benefits of such a policy is the ability to work closely with manufacturers in developing products tailored specifically to their needs. Today with ISO 14001 and ISO/TS 16949 certification as well as state-of-the-art manufacturing and inventory facilities, NGK provides customers with the finest spark plugs and complimentary products.
Thread Diameter: 12mmThread Pitch: 1.25mmSeat Type: GasketReach: 26.5mm (1.04")Hex Size: 9/16" (14mm)Terminal Type: SolidGap: .043" (1.1mm)Center ElectrodeMaterial: IridiumType: Fine WireSize: 0.6mmProjection: ProjectedGround ElectrodeMaterial: NickelType: StandardShape: Taper CutResistor: YesHeat Range: 7Features: Special GasketTorque Specs: Cast Iron: 10.8-18 lb. ft. Aluminum: 10.8-14.5 lb. ft.Electrode Material: IridiumInsulator Type: ProjectedNominal Gap: 1.1 mm