Original Equipment Copper Core Spark Plug
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Motorcraft Original Equipment Copper Core Spark Plug

Part No. SP-420 Warranty Details  

See if this part fits a specific vehicle.

Check Vehicle Fit

Motorcraft Original Equipment spark plugs are designed, engineered and recommended by Ford Motor Company.

Product Features:
  • Same part installed when the engine rolled off the assembly line
  • Designed to deliver quick starts, enhanced fuel economy and smooth acceleration
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Center Electrode Core Material:Copper core
Electrode Core Material:Inconel
Electrode Tip Material:Copper core
Ground Electrode Core Material:Nickel alloy
Hex Size:13/16 in
Insulator Type:Standard
Length:3.116
Manufacturer Heat Range:6
Reach:.468 in
Resistor:Yes
Rib Configuration:Standard
Seat Type:Tapered
Side Electrode:Yes
Terminal Top Type:Fixed
Thread Diameter:18 mm
Tip Configuration:Copper core

REVIEW SNAPSHOT®

by PowerReviews
MotorcraftOriginal Equipment Copper Core Spark Plug
 
3.8

(based on 4 reviews)

Ratings Distribution

  • 5 Stars

     

    (1)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (2)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Reviewed by 4 customers

Displaying reviews 1-4

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4.0

Good plugs

By 

from Chesterfield, VA

Verified Buyer

Comments about Motorcraft Original Equipment Copper Core Spark Plug:

Good

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(1 of 1 customers found this review helpful)

 
5.0

Original Performance

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By 

from Bedford, VA

About Me Auto Enthusiast

See all my reviews

Ask me a question

Verified Buyer
3 or more reviews submitted

Pros

  • Oem Fit And Function

Cons

    Best Uses

    • Everyday Driving
    • Restoration

    Comments about Motorcraft Original Equipment Copper Core Spark Plug:

    Installed in a '68 Mustang. Product works great. Not pre-gapped as the other reviewers have mentioned, but you should always check gap anyway!

    Only downside is that they are now Made in Mexico instead of USA as they used to be made. Still function and look correct, however.

    Comment on this reviewHelp Icon

    (2 of 2 customers found this review helpful)

     
    3.0

    Motor Craft Plugs

    By 

    from CNY

    About Me Casual Driver, Truck Enthusiast

    See all my reviews

    3 or more reviews submitted

    Pros

    • Easy To Install
    • Improves Engine Efficiency

    Cons

    • Incorrect gap

    Best Uses

    • Everyday Driving
    • Replacement

    Comments about Motorcraft Original Equipment Copper Core Spark Plug:

    Bought these because it said they would be an exact fit for my engine. The gaps on every plug were wrong. Had to gap them myself. Other than that they work just fine.

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    (2 of 2 customers found this review helpful)

     
    3.0

    Standard specs and Quality ????

    By 

    from Graham, NC

    See all my reviews

    Verified Buyer

    Pros

    • Improves Engine Efficiency

    Cons

    • Out Of Spec

    Best Uses

      Comments about Motorcraft Original Equipment Copper Core Spark Plug:

      Well, product seems as good as my orginal plugs. However these came in their boxes as if someone drugged them across the floor. Every plug was gap wrong from .20 - .65 / No sleeve cover to protect gap as most plugs have these days. However, regaped to engine specs and runs like good.

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      Do you have questions about this product?

       

      Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

      1 Question | 1 Answer
      Displaying question 1
      • Q:

        Is this a 18mm thread
        Asked on 11/7/2013 by marv from 24740

        1 answer

        • CUSTOMER CARE

          A:

          Hi Marv, yes the Motorcraft Original Equipment Copper Core Spark Plug - Part No. SP-420 has the thread size : 18 mm.

          Answered on 11/7/2013 by Morgan from AAP
      Displaying question 1

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