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Autolite XP Iridium Spark Plugs

Introducing the new Autolite XP Xtreme Performance Spark Plugs. With an iridium-enhanced, .6 mm finewire design and patented platinum sidewire technology, these plugs provide more focused ignition for better overall ignitability and improved durability.

Independent lab tests prove that Autolite XP Xtreme™ Performance Spark Plugs provide better overall ignitability and durability than many other premium spark plugs. By increasing the size of the flame kernel, you get a 21 percent bigger flame compared to that of standard plugs. The new Autolite plugs ignite more gas and air mixture inside the cylinders to deliver better overall performance. The ignition is also more focused, which provides better and faster fuel combustion, optimizing the vehicles spark plug performance.

Choose XP103's or XP104's from the drop down.

Sold in sets of 6.

Customer Reviews
5.0 Based on 12 Reviews
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Nathan J.
United States United States
Perfect items and perfect company for my Pontiac Grand Prix GT

Runs a lot smoother since I put the supercharger on and it's great for my channel I am so glad you guys sent it I will always suggest that everybody that I know that has Pontiac Grand Prix or in Pontiac to go to you guys and also I really appreciate the ignition coils that you sent I am proud to put your parts on my car

Andrew C.
United States United States
Spark Plug Change

I went with Iridium so I wouldn't have to change it so often. The V6 by the firewall isn't the funniest thing I ever have done. These should last the life of the car since it already has 150k miles

Lester C.
United States United States
Spark plugs

Awesome made my regal really open up

Justin C.
United States United States

Super fast shipping and everything is on point. Thank you I will be in touch about more I want to do. Thank you for answering my questions over the phone. Killer service.

Timothy M.
United States United States
Working good

Had misfires so I did the tune up with these and the zzp highvoltage coilpacks along with th 10.5 wires from zzp, big performance wake up