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JDC Premium COP Ignition System with GT-R Coils (Evo 4-9)

  • $ 59999

Introducing the JDC Premium Coil-on-Plug Ignition System!

This system utilizes authentic Hitachi R35 GT-R ignition coils to withstand upwards of 1100+ horsepower without needing a CDI box! The stock Hitachi coils on the GT-R are known to handle 1700+whp without issues! This system will plug straight into your factory wire harness without any modifications. It's a simple, 10 minute installation.

Are they reliable?

These systems have been tested on multiple Evo's for over two years and show great reliability as well as performance. The JDC Premium Ignition System is the only ignition system your Evo will need throughout its entire lifespan, starting with bolt-ons all the way up to a drag car pushing 1100+whp! Forget the need for a problematic CDI system. This COP System can do it all! 

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. This harness is sold separately, or can be added to any of our ignition system options for an additional $50. 

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 ran under or over the intake manifold to make its connection behind the valve cover for another hidden connection.


  • Brand new high performance Japanese made coils
  • Beautiful solid carbon fiber, Titanium, or Satin Black mounting plate
  • Choice of standard or "Hideaway" wire harness
  • Designed to work on a stock car or one making up to 1100+whp
  • High quality military spec heat sleeve protector rated to 428degF
  • Upgraded (thicker) 16g tefzel military spec wire, rated to 393degF
  • Plug and Play (no assembly required) 
  • 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
  • Non corrosive stainless steel hardware
What's in the box?
  • Assembled JDC Premium Coil-On-Plug Ignition System
  • Completely sealed waterproof wire harness
  • Stainless steel mounting Hardware
  • 15 amp fuse
  • Installation instructions & warranty information

Warranty Information:

  • Coils- 3 years
  • Wire harness & mounting plate- lifetime

Tuning Notes:

  • We suggest setting the factory dwell time at 3.4ms @14v to help keep the coils cool.
  • These upgraded coils can support up to 4.5ms which would allow you to run an even larger spark plug gap for better combustion, which could support even more horsepower.
  • For example, 3.0ms @14v has easily supported 870whp on a mustang dyno.
  • Saturation that could shorten the life of the coils and cause premature failure would be around 5.5ms @14v.
  • For high power builds a .014 - .018 spark plug gap may be sufficient, but will vary depending on your individual vehicle.


Please allow an average of 1-3 business days for your order to ship. (This is an estimated time and may take longer depending on quantity of orders and availability of parts.) Visit our website for more information or give us a call.
*All warrantees are only subject to the original buyer
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Customer Reviews

Based on 8 reviews


Thanks for your business!
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Great service

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Thanks for your business!
Best cop kit in the game hands down!

Purchased my kit and as soon as u open the box u can tell by the great quality and craftsmanship that this is going to be good! Have no issues with the kit. Installation couldn’t be simpler literally took 5 minutes. What I like about it is u don’t need that pesky expensive cdi box to make jam! 100% recommend this product to everyone! Definitely worth every penny. Jon is excellent when it comes to customer support and rapid responses as well!

Thanks for the great review Emil! I appreciate your business and look forward to your next purchase!
Best bang for your buck!

Picked up this cop for a great deal and now my car is running smooth again! This system with the new gt-r coils is easily the most affordable and best looking one out there. Don't waste your money on overpriced kits that dont have a company like JDC to back them up. Simply said!

Thanks for the awesome review! We appreciate you doing business with us and look forward to your next orders.