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


Find parts for the selected vehicle:

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

    Add a

    Add a

    Autolite Iridium Iridium Ultra Finewire Spark Plug

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

    Warranty Information
    Save $3 per spark plug by mail with the purchase of 4 or more Autolite Ultra Iridium or XP Iridium Spark Plugs (purchases must be on same transaction)
    • Product Details

      Part No. AI5682


      Autolite® Iridium Ultra Laser Finewire Spark Plugs are one of our brand's most technologically advanced products. These spark plugs provide superior durability, more focused ignition with better overall ignitability for optimum performance. Autolite® Spark Plugs are the best alternative to OE spark plugs, offering OE fit form and function supporting all foreign and domestic makes and models at a value price. Autolite provides the automotive aftermarket and original equipment manufacturers with the highest quality ignition products and is the leading supplier of spark plugs in the world.

      Product Features:

      • Autolite Iridium Ultra® is an engineered OE replacement iridium spark plug.
      • A laser-welded 0.5mm pure iridium finewire center electrode provides optimal fuel efficiency, acceleration and focused ignitability.
      • Nickel-plated shell to resist corrosion.
      • High-alumina ceramic insulator for increased strength.
      • Laser welded 0.5mm Iridium finewire center electrode.
      • Proprietary platinum sidewire technology.

    • Specifications
      • Center Electrode Core Material:Iridium
        Electrical Terminal Type:Stud
        Center Electrode Tip Material:Iridium
        Ground Electrode Core Material:Nickel
        Ground Electrode Quantity:1
        Ground Electrode Tip Design:Tapered
        Ground Electrode Tip Material:Platinum
        Reach:1.043 in
        Reach:26.5 mm
        Pre-Gap Size:0.04 in
        Pre-Gap Size:1 mm
        Thread Diameter:12 mm
        Hex Size:9/16" in
        Hex Size:14 mm
        Seat Type:Flat
        Resistor Type:Yes
    • Read Review
    • Q & A