Autolite® - Iridium XP Enhanced Alloy™ Spark Plug Set

53 reviews / Item # sp5168
Image may not reflect your exact vehicle! Autolite® - Spark Plug
Image may not reflect your exact vehicle! Autolite® - Spark PlugImage may not reflect your exact vehicle! Autolite® - Spark PlugsImage may not reflect your exact vehicle! Autolite® - Spark PlugsImage may not reflect your exact vehicle! Autolite® - Iridium XP Spark PlugsAutolite® - FeaturesAutolite® - Spark Plug InstallationAutolite Authorized Dealer
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Autolite Spark Plugs

Iridium XP Enhanced Alloy™ Spark Plug Set by Autolite®, 4 Piece Set. This high-tech spark plug features iridium-enhanced 0.6mm finewire design and proprietary platinum sidewire technology to provide superior durability and a more focused ignition for better overall ignitability. This spark plug also has a nickel-plated shell for improved corrosion protection.

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  • One of the most high-tech spark plugs on the market
  • Designed for better durability and overall ignitability, and optimum performance
  • Provides improved throttle response
  • Increases engine power and fuel economy
  • Reduces emissions
  • Ribbed ceramic design prevents flash overs
  • Iridium-enhanced center electrode for reliable performance
  • Patented, platinum sidewire technology for improved durability and longer life
  • 0.6-mm finewire design and V-trimmed platinum sidewire for improved ignitability
  • Nickel-plated shell for improved corrosion protection
  • Lasts up to ten times the life of a standard plug
  • Backed by a 7-year warranty

The spark plug is the last step in the ignition circuit. It takes a voltage surge from the coil and creates a high voltage spark that ignites the compressed air fuel mixture within each cylinder. If everything operates properly, the engine runs efficiently providing maximum fuel economy and the lowest exhaust emissions. Spark plugs are available in different materials, heat ranges, reach, thread diameter, and seat type, with features to suit engine requirements. Always use the spark plug that is specified for your engine. If the wrong plug is used, it could come into contact with a piston or valve within the engine and break causing serious damage to the engine.

With this spark plug by Autolite, you are guaranteed that it will not only fit perfectly but meet all the requirements of your engine as Autolite uses what is called a "rating engine" to match up OE plugs. Autolite engineers carefully measure OE spark plugs and then match the physical qualities with several Autolite plugs. Then they run the OE plug in their rating engine, which provides data that indicates the heat range of the OE plug. They use this data to precisely match an Autolite spark plug to both the heat range and dimensions of the OE product. Engineered, designed, and manufactured with professional care, this spark plug meets all OE standards and specifications.

With an iridium-enhanced 0.6 mm finewire design and proprietary platinum sidewire technology, this spark plug by Autolite delivers a larger flame kernel and more complete burn providing improved throttle response, engine power, and fuel efficiency. The plug ensures faster starts, prevents fouling, and provides increased durability. Its ribbed ceramic design prevents flash overs, while nickel-plated shell provides extra corrosion protection.

An innovation leader since 1936, Autolite® creates the highest quality ignition products for a wide variety of engines. Established in 1911, the company started manufacturing buggy lamps and became a thriving automotive parts manufacturer by the 1930's. Still the first Autolite spark plug saw the world in 1936 and had instant success on the market. Today, the company is known as the manufacturer of America's best-selling spark plug and offers a number of spark plug series such as Autolite XP Xtreme Performance, Autolite Platinum, Autolite Revolution HT, Autolite Double Platinum, etc.

Warranty Information

Find out everything you need to know about the product warranty

Autolite warrants that its Products will be free from defects in material and workmanship for 7-year warranty from the date of purchase by the Original Purchaser. This warranty does not apply to any Products that have been subjected to misuse, mishandling, misapplication, neglect (including but not limited to improper maintenance), improper instal lation, or alterations.

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

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Image may not reflect your exact vehicle! Autolite® - Spark Plug
Autolite® - Iridium XP Enhanced Alloy™ Spark Plug Set
Average Rating: 4.9 of 5
4.8 of 5
Plugs Definitely Improved The Performance
Starting got better now. Thought I haven't checked the new RPM yet, in a whole drivings changed to better since I replaced the spark plugs. I am glad that I bought these plugs.
TPosted by (Mesa, AZ) /
2014 Chevy Malibu
Was this review helpful for you? Yes
5 of 5
3 Years Without Problems
These spark plugs are 3 years old with over 30K and my vehicle starts as fast as the day I put them in. It takes more then 2 hours to replace the plugs on my Mercury Cougar, so I want to do it only when necessary.
CPosted by (Indian Trail, NC) /
1984 Mercury Cougar
Was this review helpful for you? Yes
5 of 5
Install The Best To Not Do Same Job Again Soon
I had them installed in my Chrysler Sebring and did not notice increased horse power, smoother idling, faster starts-up, or better gas mileage. The truth is that I didn't purchase spark plugs for performance enhancement so didn't expect all those features. I did buy these (and I am very satisfied) because iridium is stronger and has a higher melt point them platinum. I intend to get 100k miles out of these plugs.
SPosted by (Fresno, CA) /
2002 Oldsmobile Alero
Was this review helpful for you? Yes
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