HPCopper Spark Plug Single for 2004-Early 2008 Ford 3-V 4.6L,5.4L & 6.8L

ACCEL HPCopper Spark Plug -1 Piece Design for 2004-Early 2008 Ford 3-Valve 4.6L,5.4L & 6.8L Modular Engines. "C"-Cut Design allows better Exposure of the Flame Kernel to the Air Fuel Mixture.

PART# 346

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Made with a Copper Core Which is a Better Conductor than Platinum and Iridium. Delivers a Stronger Spark Especially in High Performance Application Where High Combustion Pressures Are Present. Copper is Much Better at Dissipating Heat Than Other Materials Which Lessons the Chance of a Misfire. Gapable Allowing You to Open the Gap Exposing a Larger Flame Kernel or Close it if Needed For High Boost Applications. All ACCEL HP Spark Plugs Have Machine Rolled Threads Allowing For a More Precise Thread Engagement and Torque Retention. Lastly These ACCEL HP Spark Plugs Are a ONE PIECE DESIGN Meaning You Won't Break It Off in the Head! • One Piece Design - Won't break off in head during removal like two piece design. • Copper Core - Copper is a better conductor than Iridium or Platinum plugs. • Heat Dissipation - Copper dissipates Heat Much better than other materials. • "C" - Cut Design - un-shrouding the spark kernel. • Gapable - Unlike Iridium or Platinum • Machine Rolled Threads-Precise thread engagement


Emission Code1
Product TypeSpark Plugs
Part Number346


This part is legal for use on Emissions Controlled Vehicles when used in accordance with the manufacturers application guide because it has a California Air Resources Board Executive Order number or is a direct or consolidated replacement part.

The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle

    *Free Shipping & Handling only offered to the contiguous US on orders over $100.

    Some parts are not legal for use in California or other states with similar regulations.