Copper Spark Plug
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Copper Spark Plug
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Autolite Copper Spark Plug

Part No. 306 Warranty Details  
Quantity  Add to Cart

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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:3/8 in
Seat Type:Gasket
Thread Diameter:14 mm
Tip Configuration:Standard
Wrench Diameter:13/16 in


by PowerReviews
AutoliteCopper Spark Plug

(based on 1 review)

Ratings Distribution

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  • 1 Stars



Reviewed by 1 customer

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would buy again and again


from ny

About Me Auto Enthusiast

Verified Buyer


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


    Best Uses

    • Replacement

    Comments about Autolite Copper Spark Plug:

    nice servce replacement

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    1 Question | 1 Answer
    Displaying question 1
    • Q:

      Is autolite spark plug # 306 the correct plug for my 1952 cj-3a willys jeep? It has the L-134 flathead engine. If not, which plug is recommended? R. Lewis
      Asked on 5/7/2012 by billybob from Mid missouri

      1 answer



        Yes, this Autolite Double Platinum Spark Plug - Part No. 306 fits your 1952 CJ-3A Willys Jeep.

        Answered on 5/11/2012 by Steve from AAP
    Displaying question 1

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