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JDC Coil-On-Plug Ignition System Refurbished Denso Coils

Refurbished coils are getting harder to source and our inventory fluctuates. If you would like to check our current stock before ordering, please email support@jdcustomsusa.com or call us at 423-665-9616. Purchasing a kit with new Denso coils is recommended since we keep those in stock at all times.

Suffering from spark blowout issues on your underpowered OEM coils? The JDC Ignition System is what you need! The JDC Coil-On-Plug Ignition System is a direct replacement to your factory Evolution 4-9 coils and ignition wires and simply plugs in and bolts down! No assembly is required to replace your bad ignition coil set! Simply remove the setup from the box and install it on the car. This system utilizes 100% authentic high-performance, Japanese-made Denso Ignition Coils, not the cheap off-brand coils that won't perform as well or last as long.

The JDC Coil-On-Plug Ignition System is made in the USA. These systems are guaranteed to perform the same as SparkTech/ Spoolin' Up non-CDI systems! The JDC systems have been on the market since 2015 and have proven to be one of the best-performing and reliable systems out there!
 

About the Hideaway Harness Option:

  • This harness uses the same high-quality connectors, military spec tefzel wire, and wire sheath as our standard COP ignition wire harness, but this one hides under the mounting plate for a super clean, wire tucked look! This harness offers the same quality and performance as you'd expect from any product offered by JD Customs USA. This harness is sold separately or can be added to any of our ignition system options for an additional $30. 

How is this harness different?

  • Both leads come out from the valve cover on the right side and are concealed by a single plug wire sheath. The right-side connector makes its hidden connection behind the thermostat housing and the left side lead can be run under or over the intake manifold to make its connection behind the valve cover for another hidden connection. Click here for more info on the "Hideaway" harness. 
 

What's in the box?

  • Assembled JDC Coil-On-Plug Ignition System
  • Mounting Hardware
  • 15A Fuse
  • QR Code for Online Instructions

 

2 Year warranty on Refurbished Denso coils

  • Lifetime warranty on wire harness and mounting plate
  • Fits under OEM spark plug cover and most aftermarket covers
  • Tested to 913whp @ 0.020" spark plug gap 
  • Military spec wire sheath, rated to 428degF
  • Military spec tefzel wire, rated to 393degF
  • Waterproof seals on all ports
  • Plug and Play (no assembly required) 
  • No retune needed after install
  • Gain 8-20 HP/TQ (mod dependent)
  • Greatly reduce or eliminate partial throttle bucking
  • Better overall idle quality
  • Quicker and easier start, especially in colder weather with E85
  • Run more boost without spark blowout issues
  • Run more gap for better fuel burn and increased mpg
  • Plugs last longer due to less fouling
  • Makes changing plugs extremely simple
  • No problem-prone CDI boxes to worry about
  • Choice of satin black anodized 6061 billet aluminum, solid carbon fiber, or Titanium mounting plate
  • Choice of standard or "Hideaway" wire harness
  • Choice of stainless steel or titanium hardware

JD Customs USA

JD Customs USA specializes in bespoke titanium pieces with virtually unlimited customization options. Known for vibrant colors and unmatched craftsmanship, we bring your creative visions to life. From precision to personalization, our commitment to quality ensures every piece exceeds expectations. At JD Customs USA, we don’t just create products – we deliver perfection.

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