JDC DIY Coil-On-Plug Ignition System Kit (Evo 4-9)


$ 119.99


Due to the current high demand and low availability of good quality refurbished coils, please expect a 4-6 week delay (subject to change) when ordering refurbished coils.

This kit includes everything you need to make your own Mitsubishi Evolution 4-9 COP (coil on plug) setup.

The kit includes:

  • Choice of bare stainless steel, 6061 anodized satin black aluminum, solid carbon fiber, or "cut your own" mounting plate. Titanium mounting plates are available here
  • (2) Mitsubishi Evolution male connectors with pins and water seals
  • (4) Denso connectors with pins and water seals
  • Stainless steel mounting hardware and 15 amp fuse
  • High strength/heat tefzel wire (15ft.) 
  • High temperature wire sheath (4.5ft.) 
  • Detailed instructions with pictures and wiring diagram. (Click here for detailed assembly instructions and video.)
  • JDC Stickers for the top of each coil
  • New, or Refurbished Denso Coils (Optional)


  • 3 Year warranty on new Denso coils, 2 year 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" plug gap
  • Military spec heat sleeve protector on wiring, rated to 428degF
  • Tefzel military spec wire, rated to 393degF
  • Plug and Play (assembly required) 
  • No retune needed 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
  • Non corrosive stainless steel hardware

This kit is designed to work with Denso coils part # 90919-02240/90919-02265. The coils are optional with this kit. You can provide your own coils if you wish. 

Don't forget to change your spark plugs! Add them to your order here: Denso Spark Plugs or NGK Spark Plugs

This kit is very simple to make for yourself if you have basic wiring or automotive knowledge, and it will save you HUNDREDS of dollars over buying the exact same thing made by someone else. This kit uses high quality components! If you would rather purchase a fully assembled kit or a pre-made wire harness, they are available here. You can also purchase individual pieces if you don't need an entire kit. Send us a message if you have questions or call/text (423) 665-9616. 

Customer Reviews

Based on 13 reviews
Amazing customer service

had issues with putting the DIY kit together every time i’d ask a question regarding the kit and putting everything together i got a reply fast which helped the process customer service at its finest

Thanks for the review! I'm glad out customer service exceeded your expectations! Thanks for your business!
Terrific installation instructions and customer support!

As the title says, the instructions were very clear and first timer friendly. Emails were responded to amazingly fast (under one hour)

Thanks for the review! I'm glad to hear you were able to assemble your kit with no issues. Thanks for your business!
World Class Customer Service

Packaged very well and shipped quickly came unexpected! Watched live on Instagram to build it the same time with all recommened tools. I crimped 3 of he wrong clips and had to stop the proccess, however this was no problem, contacted John, was able to order extra pieces immidiantly to ship on the way! He was completely understanding. Instructions are very easy to fallow regardless. Such a simple great MOD, will be back for more goodies!!

Thanks so much for the awesome review Aaron! I'm glad I was able to help you out on the wire building process and get your DIY COP system built! I look forward to doing more business with you soon. :)

Best MOD ever! If you have any experience doing electrical splicing, I recommend this,easy to do!

Thanks Roberto! I'm glad you're happy with your purchase. I look forward to doing more business with you soon.
Evo9 Cop kit

I really like it, work's well, and the instruction are straight forward.

Thanks for the review Thomas! We try to make our kits as simple and straight forward as possible. It's great that it worked well for you. Thanks for your business!

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