Copper Spark Plug
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Autolite Copper Spark Plug

Part No. 5125 Warranty Details  

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Autolite Copper Spark Plugs are guaranteed to deliver quick starts, good fuel economy and smooth acceleration.

Product Features:
  • Copper cored center electrode for higher thermal conductivity
  • Specially engineered high nickel alloy center and ground electrode for extended life
  • High alumina ceramic for high dielectric strength
  • Leak proof, heat fused internal seal for durability
  • Multi-rib insulator prevents flash-over
  • 2 year limited warranty
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Electrode Tip Material:Resistor
Reach:.460 in
Resistor:Suppressor
Seat Type:Tapered
Thread Diameter:18 mm
Tip Configuration:Power
Wrench Diameter:13/16 in

REVIEW SNAPSHOT®

by PowerReviews
AutoliteCopper Spark Plug
 
4.8

(based on 4 reviews)

Ratings Distribution

  • 5 Stars

     

    (3)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Improves engine efficiency (3)
  • Increases power (3)

Cons

No Cons

Best Uses

  • Replacement (3)

Reviewed by 4 customers

Displaying reviews 1-4

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5.0

Great Product

By 

from Plattin, MO

Verified Buyer

Comments about Autolite Copper Spark Plug:

This plug is built well.

  • Was this a gift?:
  • No
 
5.0

Great Replacement

By 

from Rolesville, NC

About Me Casual Driver

See all my reviews

Ask me a question

Verified Buyer
3 or more reviews submitted

Pros

  • Improves Engine Efficiency
  • Increases Power
  • Perfect For F150 49

Cons

    Best Uses

    • F150 49 Engine
    • Replacement

    Comments about Autolite Copper Spark Plug:

    Perfect replacement for Ford F150 4.9 engine.

     
    5.0

    Great Part! Great Seller!

    By 

    from Hudson,MI.

    About Me Mechanic, Truck Enthusiast

    See all my reviews

    Verified Buyer
    Helpful Reviewer

    Pros

    • Durable
    • Easy To Install
    • Improves Engine Efficiency
    • Increases Power

    Cons

      Best Uses

      • Everyday Driving
      • Performance Driving
      • Racing
      • Replacement
      • Restoration

      Comments about Autolite Copper Spark Plug:

      These are great plugs for the Ford 4.9L inline 6.They last a long time and are very reasonable.They are not good for some of the new very hot ignition systems,for that you need a double platinum or iridium plug,which they also carry.They are great for the 300c.i.d. Ford inline 6 because they don't use excessive power and have a very long life.I depend on my truck for several 800 mile trips per year and I know I can count on these spark plugs.I usually change them every 2 yrs just as preventative maintenance,never because one failed.

       
      4.0

      Autolite always a trusted name.

      By 

      from Southern NJ

      About Me Casual Driver

      See all my reviews

      Verified Buyer
      3 or more reviews submitted

      Pros

      • Durable
      • Easy To Install
      • Improves Engine Efficiency
      • Increases Power

      Cons

        Best Uses

        • Everyday Driving
        • Replacement

        Comments about Autolite Copper Spark Plug:

        Plugs seated and went in without any problem. Always have used this brand and will continue. Dont forget your anti sieze.

        Displaying reviews 1-4

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