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JD Customs U.S.A

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

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

Regular price $100.00
Regular price Sale price $100.00
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Mounting Plate

JDC DIY Denso Coil-On-Plug Ignition System Kit

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.

This kit includes everything you need to make your own Mitsubishi Evolution 4-9 COP (coil on plug) setup. This kit includes the exact same pieces we use to make our JDC ignition systems. If you're the kind of person that likes to save money and make your own parts, this kit is for you!

Titanium hardware can be purchased here!



  • 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¬†and is not needed to meet your power goals up to 913whp+.¬†
  • 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.¬†

The kit includes:

  • Your choice of 6061 anodized satin black aluminum, carbon fiber, anodized titanium, or stainless steel "cut your own"¬†mounting plate.
  • (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 high heat 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
  • 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
  • Noncorrosive stainless steel hardware


This kit is very simple to make for yourself if you have basic wiring or automotive knowledge and can save you a lot of money over buying a fully assembled kit. 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.

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