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    Denso Spark Plug Iridium Power

    Part # 5338
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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. 5338

      Warranty Details (1 YR REPLACEMENT IF DEFECTIVE)

      Increased performance with World's smallest Iridium Center Electrode (0.4mm).

      Product Features:

      • No-compromise, top of the line race spark plug for the most serious enthusiast.
      • Patented U-groove ground electrode design fires leaner mixtures than conventional plugs
      • Precision machine-rolled threads reduce seizing and cross-threading in delicate aluminum heads
      • Wide range of part numbers for thousands of applications, including classic and collector cars
      • Lasts twice as long as most conventional plugs
      • Withstands temperatures greater than 4000° Fahrenheit

    • Specifications
      • Electrode Core Material:Copper
        Electrode Tip Material:0.4mm Iridium
        Ground Strap Quantity:1
        Insulator Type:Purified Alumina
        Manufacturer Heat Range:16
        Material:0.4mm Iridium
        Reach:.984 in
        Resistor:Yes
        Seat Type:Tapered
        Thread Diameter:14 mm
        Tip Configuration:0.4mm Iridium
        Type:Iridium 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.