ACCEL 578C2-4 HP Copper Spark Plug - 14mm Thread Size with Copper Core

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0.95 (in)
1.00 (in)
3.50 (in)

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Spark Plug HP Copper Spark Plug

HP Copper Spark Plug; 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; 4 Pack;

  • Assembly Method: Tapered
  • Gap Size: 0.030 in.
  • Hex Size: 0.625 in.
  • Package Quantity: 4
  • Projected Tip: Yes
  • Reach: 1.000 in.
  • Resistor: Yes
  • Seat Type: Tapered
  • Thread Pitch: 1.25mm
  • Thread Size: 14mm
  • Torque Capacity: 7.2 ft/lbs. - 14.5 ft/lbs.
  • WARNING CA Proposition 65: No

  • 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!

ACCEL U-Groove performance spark plugs have a patented U-shaped ground electrode that produces a double wide, hotter spark to ignite standard or even the highest compression engines. The sintered alumina heavy-duty five rib insulator eliminates flashover and overheating that occurs with high performance and long range applications. ACCEL U-Groove spark plugs use the purest copper/nickel alloy electrode to produce a broad heat range that is highly foul resistant and dissipates heat better than any other material. Years of racing and street performance research has proven that ACCEL U-Groove spark plugs deliver the hottest spark and the highest performance of any spark plug available

Fits the following models:

  • 2012-2017 Ford Edge

  • 2012-2017 Ford Explorer

  • 2013-2017 Ford Escape

  • 2013-2017 Ford Focus

  • 2013-2017 Ford Fusion

  • 2013-2017 Ford Taurus

  • 2014-2017 Ford Fiesta

  • 2014-2017 Ford Special Service Police Sedan

  • 2014-2016 Ford Transit Connect

  • 2015-2017 Ford Mustang

  • 2012-2017 Land Rover Range Rover Evoque

  • 2013-2015 Land Rover LR2

  • 2015-2017 Land Rover Discovery Sport

  • 2013-2016 Lincoln MKT

  • 2013-2017 Lincoln MKZ

  • 2015-2017 Lincoln MKC

  • As always, 21 Motorsports offers FAST and FREE shipping on ACCEL part number 578C2-4. Please look around to find more great items from ACCEL and all the other great spark plugs & glow plugs and ignition system parts you love!
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    Warranty Information

    Full manufacturer's warranty
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