Copper Spark Plug
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Copper Spark Plug
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Autolite Copper Spark Plug

Part No. 4303 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:3/4 in
Seat Type:Gasket
Thread Diameter:10 mm
Tip Configuration:Standard
Wrench Diameter:5/8 in


by PowerReviews
AutoliteCopper Spark Plug

(based on 3 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 3 customers

Displaying reviews 1-3

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2nd time buying


from undisclosed

See all my reviews

Verified Buyer

Comments about Autolite Copper Spark Plug:

Used this plugs before, lasted as long as the NGK $6 plug with no change in performance.

(2 of 2 customers found this review helpful)


does not match NGK CPR7EA-9


from NEPA

About Me Mechanic


  • None


  • Tip Is Not Extended

Best Uses

  • Only For Exact Fit

Comments about Autolite Copper Spark Plug:

This does not match the NGK CPR7EA-9 Spark plug. The tip is extended on the NGK. This Autolite has a recessed tip. Thus not getting the spark into the cylinder head as designed by the manufacture.
Was being used on a Kawasaki Valcan 900.

(10 of 22 customers found this review helpful)


"Exact fit" doesn't really mean exact fi


from Naples Florida

Verified Buyer
Helpful Reviewer

Comments about Autolite Copper Spark Plug:

Not good product

Displaying reviews 1-3

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