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    ACDelco Iridium Spark Plug (12621258)

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    Warranty Information
    • Product Details

      Part No. 41-110

      Warranty Details (7 YR REPLACEMENT IF DEFECTIVE)

      ACDelco Professional Iridium Spark Plugs are a high quality replacement for many vehicles on the road today. They are our latest in spark plug technology and an exact replacement for your vehicle's original components. Iridium composition provides a high melting point and great strength, and provides excellent wear resistance and durability. These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form, and function.

      Product Features:

      • Iridium offers excellent engine idle stability and smooth performance
      • Iridium allows for small, efficient electrode designs for reliable cold starting and quick acceleration
      • Iridium fine-wire electrode helps burn away carbon deposits on the tip of the plug as they form
      • One piece suppressor seal helps block radio frequencies that can affect vehicle electronics
      • Suppressor seal meters spark energy for long electrode life and helps prevent combustion leakage

    • Specifications
      • Center Electrode Core Material:Nickel Alloy
        Center Electrode Tip Material:Iridium
        Electrical Terminal Type:Solid Post
        Ground Configuration:Single Strap
        Ground Electrode Core Material:Nickel Alloy
        Ground Electrode Quantity:1
        Ground Electrode Tip Design:Platinum Alloy Pad
        Hex Size:16 mm
        Insulator Height:25 mm
        Manufacturer Heat Range:16
        Pre-Gap Size:1.025 mm
        Programming Required:No
        Reach:17.5 mm
        Resistor Type:Yes
        Seat Type:Tapered
        Spark Plug Approximate Resistor Value:4000-7500 ohms
        Thread Diameter:0.551 in
        Thread Pitch:1.25 in
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