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


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