HP Copper Spark Plug, Ford 2004 to Early 2008

3 valve 4.6L, 5.4L and 6.8L V8 engines - one range colder, single pack

PART# 3461C1

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ACCEL HP Spark Plugs are made with a Copper core which is a better conductor than Platinum and Iridium. They deliver a stronger spark especially in high performance applications where high combustion pressures are present. Copper is much better at dissipating heat than other materials which lessens the chance of a misfire. ACCEL HP Spark Plugs are 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 they are a ONE PIECE DESIGN meaning you won't break it off in the cylinder head!


  • One Piece Design - Won't break off in head during removal like two piece designs
  • The Copper core is a better conductor than Iridium or Platinum plugs
  • Copper dissipates heat much better than other materials
  • "C" - Cut Design un-shrouds the spark kernel for a better burn
  • Unlike Iridium or Platinum plugs, the ACCEL HP plugs are gapable
  • Machine rolled threads for precise thread engagement
  • One step colder than stock


Heat Range1 Step Colder
Hex Size9/16"
Product TypeSpark Plugs
Projected TipNo
Seat TypeTapered
Thread Pitch1.25mm
Thread Size16mm
Torque Specification20-25 lb.ft
Part Number3461C1

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