Skip to Main Content Skip to Footer Links
Error occured! Please reload the page and try again
Choose a Store
Open till 
There are vehicles in your garage

Free shipping on orders over $35.

Enroll in Speed Perks for more savings.


Cart is empty!


Add Something to the cart

includes estimated shipping



Vehicle added

Vehicles

Find parts for the selected vehicle:

View Vehicles
Are you sure you want to delete this vehicle?

    Add a


    Add a


    ACDelco Iridium Spark Plug

    Loading ...
    Exact Fit May Not Fit Doesn't Fit for your

    Warranty Information
    Save 25% on 4 or more Autolite Iridium Spark Plugs with the purchase of any advertised Full Synthetic or Full Synthetic High Mileage Oil Change Bundle. See rebates page for additional offers.
    • Product Details

      Part No. 41-114

      Warranty Details (7 YR REPLACEMENT IF DEFECTIVE)

      ACDelco GM Original Equipment Iridium Spark Plugs are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These 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. ACDelco GM Original Equipment parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional.

      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
      • Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional
      • ACDelco GM Original Equipment parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
      • GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
      • GM regularly updates production and service part designs to integrate new materials and technologies

    • 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:16mm
        Insulator Height:0.99 in
        Manufacturer Heat Range:16
        Pre-Gap Size:0.04 in
        Programming Required:No
        Reach:0.98 in
        Resistor Type:Yes
        Seat Type:Tapered
        Spark Plug Approximate Resistor Value:4000-7500 ohms
        Thread Diameter:0.551 in
        Thread Pitch:1.25 in
    • Read Review
    • Q & A