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JD Customs U.S.A

JDC "Show Series" Coil-On-Plug Ignition System (Evo 4-9)

JDC "Show Series" Coil-On-Plug Ignition System (Evo 4-9)

Regular price $459.00
Regular price Sale price $459.00
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Mounting Plate Style
Mounting Hardware

JDC "Show Series" Coil-On-Plug Ignition System

Refurbished coils are getting harder to source and our inventory fluctuates. If you would like to check our current stock before ordering, please email 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.

We're proud to introduce the new JDC "Show Series" Ignition systems! These systems use the same high-quality components as our standard systems, but include a newly designed solid carbon fiber mounting plate that has a better overall "show car" appearance, while still offering the same great performance! Each coil is recessed into the plate for the same overall height to the spark plugs, but there's no gap left between the coils and the plate! These systems are only available with a carbon fiber mounting plate and an optional upgrade to titanium mounting hardware.

You can choose from two mounting plate and wire harness styles:

  • "Standard" Show Kit -¬†¬†This¬†mounting plate/wire harness option includes the traditional wire harness that connects on both sides of the valve cover. This is a direct fit and doesn't require any modifications to install.
  • "Hideaway" Show Kit - This option includes the hideaway harness, which tucks underneath the mounting plate using precision CNC cut holes, and makes its connections behind the valve cover for a wire tucked look! This mounting plate also now covers the gap that is normally left on the passenger side valve cover area. To use this mounting plate you will need to remove the bracket on the left side that is normally used to hold the O2 sensor connector.¬†

Read more below

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 wires and simply plugs in and bolts down! No assembly required! 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!

  • Works with all Evo 4-9 USDM/JDM models (select the correct option according to the valve cover you have. Evo 9 with MIVEC is different than Evo 4-8.)
  • This ignition system is¬†designed for use with the stock ECU and is compatible with AEM EMS V1 & V2, Haltech, MegaSquirt, and the SunAuto Hyperforce. This system will NOT work with CDI boxes or the HKS DLI.


  • 3-year warranty on new Denso coils, 2-year on refurbished,¬†lifetime warranty on wire harness and mounting plate
  • Fits under OEM spark plug cover and most aftermarket covers
  • Tested to 913whp @ 0.020" plug gap
  • Military spec wire sheath, rated to 428degF
  • Military spec tefzel wire, rated to 393degF
  • Waterproof seals on all ports of wire harness
  • Plug and Play (no assembly required)¬†
  • No retune required after install
  • Gain HP/TQ (8-20 hp is the norm, mod dependent)
  • Greatly reduce or eliminate partial throttle bucking
  • Better 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
  • Plug changes take minutes less
  • No problem-prone CDI Boxes
  • Choice of standard or "Hideaway" wire harness
  • Non-corrosive stainless steel or titanium hardware.
What's in the box?
  • Assembled JDC "Show Series" Coil-On-Plug Ignition System
  • Mounting Hardware (your choice of stainless or titanium)
  • 15A Fuse
  • Installation Instructions & warranty information

Introducing our new "Hideaway" wire harness!

  • This harness uses the same high-quality connectors, military spec tefzel wire, and wire sheath as our standard COP 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!

How is this harness different?

  • Both leads come out from the valve cover on the right side and are concealed by a single 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.¬†

Warranty Information:

  • New Coils- 3 years
  • Refurbished Coils- 2 Years
  • Wire harness & mounting plate- Lifetime
  • Warranty only applies to the original buyer and is non-transferable¬†
  • Warranty does not cover water damages or any other abnormal issues due to improper maintenance or care.


  • Please allow an average of 2-4 business days for your order to ship. (This is an estimated time and may take longer depending on the number of orders and availability of parts.)¬†

Want to add a lifetime warranty for a system with new coils? Click here for more info! 

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