Iridium Ultra®


Autolite Iridium Ultra® Spark Plugs

When looking for a spark plug replacement to optimize the performance for the most technologically advanced engines, you need the most technologically advanced spark plug. The Autolite Iridium Ultra Spark Plug utilizes a finewire iridium centerwire tip design with laser-welded technology for optimal performance, durability*, ignitability** and fuel efficiency. These iridium spark plugs are now available with a lifetime limited warranty.

*Compared to 0.8 mm finewire, multi-electrode design and standard spark plugs.
**Compared to average of other premium brands.

  • Includes an ultra finewire iridium centerwire tip design with laser-welded technology providing a focused ignition for optimal ignitability and maximum performance
  • Optimal fuel efficiency, acceleration and focused ignitability provided by a finewire center electrode*
  • Provides durability for more than 100,000 miles
  • Laser-welded iridium finewire center electrode tip with proprietary iridium alloy
  • *Versus standard copper core spark plugs

Click on the link below to check out our Spark Plug Metallurgy Comparison Chart.

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Autolite highly recommends that you consult with your vehicle’s owner’s manual for any specific instructions for changing the spark plugs. Engines can vary widely by make and model. These instructions should be considered for general guidance only.
Replacing spark plugs can be a simple job, if you take things one step at a time. Given a basic understanding of mechanical matters, here's a guide to the proper procedures in changing spark plugs.

  • High alumina multi-rib ceramic insulator prevents flash-over
  • Nickel-plated shell
  • Tapered ground electrode for enhanced ignitability
  • Finewire laser-welded centerwire provides focused ignition for improved acceleration and optimal fuel efficiency
  • Iridium-enhanced platinum alloy pad limits gap erosion for 100K mile service life
Autolite spark plugs provide OE-equivalent quality and performance to over 95% vehicle applications. Available now at participating Advance Auto Parts locations and online at

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