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ACCEL 578C2 HP Copper Spark Plug

6834855 - 578C2

2 Heat Ranges Colder Than Stock - 0.026 in. Gap - 5/8 in. Hex Size - 1 in. Reach - Resistor - Tapered Seat Type - 1.25mm Thread Pitch - 14mm Thread Size - Each

578C2 HP Copper Spark Plug ACCEL

View the Full List of Automotive Applications »


ACCEL - HP Copper Spark Plug - Part#: 578C2 Features:

  • 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 Better Burn
  • Unlike Iridium Or Platinum Plugs - The HP Plugs Are Gapable
  • Machined Rolled Threads For Precise Thread Engagement
  • Two Steps Colder Than Stock
  • Whether Using On Street/Strip The HP Copper Core Plugs Deliver!

View the Full List of Automotive Applications »

Below is an abbreviated list of applications for the HP Copper Spark Plug.
Discovery Sport, Edge, Escape, Expedition, Explorer, F-150, Fiesta, Flex, Focus, Fusion, GT, LR2, MKC, MKS, MKT, MKZ, Mustang, Navigator, Police Interceptor Sedan, Police Interceptor Utility


For more than 40 years, ACCEL has been a leader in performance fuel and ignition systems, proving itself on the racetracks and drag strips of the world – and on the street. With an ever-expanding line of SuperCoils and all the spark plug wires, tune-up kits, and fuel injectors hot rodders have trusted and relied on for years, ACCEL is constantly developing innovative new products designed to push power, speed, and performance to match advancements in automotive technology. Now part of Holley Performance, ACCEL offers a comprehensive selection of performance products, including coils, digital fuel injection systems, fuel injectors, distributors, caps, rotors, ignition wires, spark plugs.

Shipping Information

  • Item Requires Shipping
  • 0.1 lbs.
  • W0.9800” x H0.9800” x L3.7400”

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