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JDC Coil-On-Plug Ignition System Refurbished Denso Coils

Eliminate spark blowout and upgrade your ignition system with the JDC Coil-On-Plug Ignition System featuring authentic refurbished Denso ignition coils. Designed as a direct replacement for the factory Mitsubishi Lancer Evolution 4-9 ignition system, this setup replaces the factory coils and plug wires with a modern coil-on-plug solution that installs quickly and easily.

This system arrives fully assembled and ready to install. Simply remove it from the box, bolt it onto the engine, and connect it to the factory wiring. No assembly or wiring modifications are required.

This version of our COP system uses authentic refurbished Denso ignition coils, making it a more affordable option for customers who still want genuine Denso components instead of inexpensive off-brand replacement coils. The refurbished Denso coils are backed by a 2-year warranty.

Designed and assembled in the USA, the JDC COP system has been available since 2015 and has proven to be a reliable, high-performing non-CDI ignition upgrade for the Evo platform.

Features

  • Fits Mitsubishi Lancer Evolution 4-9
  • Direct replacement for factory coils and ignition wires
  • Plug-and-play installation with no assembly required
  • Authentic refurbished Denso ignition coils
  • 2-year warranty on refurbished Denso coils
  • Designed and assembled in the USA
  • Proven performance and reliability since 2015
  • Comparable performance to SparkTech and Spoolin Up non-CDI systems

Performance Benefits

  • Helps eliminate spark blowout under higher boost levels
  • Provides stronger and more consistent spark energy
  • Improves combustion efficiency and throttle response
  • Helps reduce spark plug fouling
  • Supports larger spark plug gaps for improved fuel burn

Refurbished Denso Coils

This system includes authentic Denso ignition coils that have been refurbished rather than new Denso coils.

Choosing refurbished coils allows you to retain genuine Denso components at a lower price than our system equipped with brand-new Denso coils. Each refurbished Denso coil included with this system is covered by a 2-year warranty.

If you prefer brand-new Denso coils, please select our JDC Coil-On-Plug Ignition System with New Denso Coils instead.

Hideaway Harness Option

The optional Hideaway harness provides a cleaner, wire-tucked installation while maintaining the same performance and reliability as the standard harness.

This harness uses the same high-quality connectors, military-spec Tefzel wire, and protective wire sheath as the standard JDC COP harness. The wiring routes underneath the mounting plate for a much cleaner appearance.

Key Differences With the Hideaway Harness

  • Both leads exit the valve cover on the right side
  • Wires are concealed within a single protective sheath
  • Right-side connector hides behind the thermostat housing
  • Left-side lead routes under or over the intake manifold and connects behind the valve cover

The Hideaway harness can be purchased separately or added to an ignition system order for an additional cost.

Titanium Mounting Plates

Titanium mounting plates are color-matched to the selected hardware color by default. If you would like a specific plate and hardware color combination, please contact us before placing your order.

For cleaning titanium mounting plates, use JDC Titanium Cleaner, Windex, or another safe glass cleaner with a microfiber towel. Avoid harsh chemicals and metal polishes, as they may damage or remove the anodized finish.

For a full list of titanium color options, check out our JDC Titanium Color Options. If you want to learn how to keep your titanium clean, take a look at JDC Titanium Maintenance and Care.

Warranty Information

  • Refurbished Denso Coils: 2 years
  • Wire Harness: Lifetime
  • Mounting Plate: Lifetime

Warranty coverage applies only to the original purchaser and is non-transferable.

The warranty does not cover water damage or problems caused by improper installation, maintenance, misuse, or care.

Why Choose the JDC Ignition System?

Since 2015, JD Customs USA has been a trusted authority on Evo coil-on-plug ignition systems, with thousands of JDC COP systems sold and proven in street, track, and high-horsepower applications around the world. Our systems are widely recommended by respected tuners throughout the Evo community because of their consistent performance, proven reliability, and long-term durability. With more than a decade of hands-on experience designing, assembling, supporting, and refining these ignition systems, JDC has become one of the most experienced and established sources for Evo 4-9 COP conversions.

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

JDC Titanium hardware is backed by a Lifetime Finish Warranty covering fading or discoloration of standard JDC titanium finishes. This warranty applies specifically to qualifying JDC titanium hardware products. Products featuring custom logos, artwork, or special designs may not qualify for standard no-charge refinishing and could require a refinishing fee. Warranty does not cover discoloration due to improper use of chemicals.

For more information see: JDC Warranty Policy

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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