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    Motorcraft Spark Plug

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    Warranty Information
    Save up to $3 on select ACDelco and Autolite spark plugs by Mail. See Rebates Page for details.
    • Product Details

      Part No. SP-420

      Warranty Details (2 YR REPLACEMENT IF DEFECTIVE)

      Motorcraft 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

    • Specifications
      • 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
        Manufacturer Heat Range:6
        Reach:.468 in
        Rib Configuration:Standard
        Seat Type:Tapered
        Side Electrode:Yes
        Terminal Top Type:Fixed
        Thread Diameter:18 mm
        Tip Configuration:Copper core
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