HPCopper Spark Plug 8-Pack for 2008-2014 Ford 3-Valve 4.6L & 5.4L Eng.

ACCEL HPCopper Spark Plug for 2008-2014 Ford 3-Valve 4.6L & 5.4L Modular Engines. "C"-Cut Design allows better Exposure of the Flame Kernel to the Air Fuel Mixture.

PART# 8161

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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.


  • For use with Brown Coil Boot, OE Coil 3L3E or ACCEL 140033E or 140033E-8
  • 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
  • See PN 354 for Single Spark Plug
  • Machine Rolled Threads-Precise thread engagement


Electrode MaterialCopper
Emission Code1
Product TypeSpark Plugs
Thread Size12mm
Part Number8161


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.