HP Copper Spark Plug, Ford EcoBoost 1.6L, 2.0L and 2.3L I4 engines -one range colder, 4 pack

Copper Core Spark Plugs Deliver a Stronger Spark for High Performance Applications

PART# 578C1-4

$18.82   Suggested Retail
$16.94   Your Price
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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.


  • 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
  • Whether using on the street or on the strip, ACCEL HP Copper Core spark plugs deliver!


ApplicationFord EcoBoost
Heat Range1 Step Colder
Hex Size5/8"
Product TypeSpark Plugs
Projected TipYes
Seat TypeTapered
Thread Pitch1.25mm
Thread Size14mm
Torque Specification7.2-14.5 lb.ft.
Part Number578C1-4

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