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    Autolite Iridium XP Iridium XP Spark Plug

    Part # XP3924
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    Save $10 after mail-in rebate when you buy 4 or more Denso Iridium Spark Plugs. See rebates page for details.
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    • Product Details

      Part No. XP3924

      Warranty Details (LIMITED LIFETIME REPLACEMENT)

      Our best spark plug! Autolite has over 100 years of engineering experience and has sold over 11 billion plugs. Designed and engineered in the USA, the Autolite Iridium XP spark plugs feature an iridium-enhanced 0.6mm finewire design and patented platinum sidewire technology to provide better overall durability and a more focused ignition for enhanced ignitability and performance. Features double Iridium-enhanced alloy technology center electrode for improved durability and wear resistance.

      Product Features:

      • 0.6 mm finewire design improves ignitability
      • Patented V-trimmed platinum sidewire technology resists wear
      • OE equivalent design is engineered for every engine
      • Designed for better overall durability with virtually no gap erosion

    • Specifications
      • Electrode Tip Material:Xtreme Performance
        Reach:3/4 in
        Resistor:Suppressor
        Seat Type:Gasket
        Thread Diameter:14 mm
        Tip Configuration:Power
        Wrench Diameter:5/8 in
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    Disclaimer: We strive to keep all information accurate and up-to-date; however, product availability, pricing, promotions and store hours are subject to change without notice. Please contact Customer Care if you have any questions or corrections.