STM Coil-On-Plug Ignition for Evo 4-8 with Denso Coils

STM Tuned Inc.



We price match!

The STM Coil-On-Plug (COP) Ignition System fits all Evo 4/5/6/7/8 is a direct replacement to your factory coils and wires and simply plugs in and bolts down! This piece will fit under your factory spark cover, or you can leave it open to breathe and stay cool.

Shipping Times: 2-4 Weeks
These COP kits are hand assembled and recently we've been waiting on components for them to be completed. Accounting for build and wait time, these kits typically ship in 2-4 weeks, sometimes sooner!

Vehicle Fitment:
1996-2005 Evolution IV V VI VII VIII
• Plug and play, no tuning required
• Designed for use with OEM valve covers only
• Does not fit the Magnus aluminum valve cover and this is unconfirmed with the FrontlineFab cover
• We offer these kits in a few different styles for Evo 9 and Evo 4-8. See More COP Options

More Info:
The STM Coil-On-Plug Ignition System is USA-Made with genuine Denso ignition coils and features a waterproof harness constructed from military grade Tefzel Teflon wire, Stay-Clean wire sheathing and a thick, carbon fiber mounting plate with stainless and aluminum hardware.

This ignition can be used from stock applications up to 800 HP. 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.

• Fits under spark plug well cover
• Handle 650+ HP, tested to 800 whp
• Plug and Play
• Gain HP/TQ (8-20 hp is the norm, mod dependent)
• Greatly reduce or eliminate partial throttle bucking
• Better idle quality
• Accelerates like a new car
• Run more boost
• 4 coils instead of 2
• Hotter spark
• Run more gap for better fuel burn
• Plugs last longer due to less fouling
• No wimpy spark plug wires to worry about
• Plug changes take minutes less
• Increased gas mileage
• Lightest System available
• No problem prone CDI Boxes
• Looks great!
• Non corrosive hardware will keep it looking great!
• Beautiful Carbon Fiber mounting plate
• Directions included
• 3 Year Warranty on Coils
• Lifetime on Workmanship (Harness, Mount Plate)

(1) Assembled STM Coil-On-Plug Ignition System
(1) Assembled Wire Harness
(1) Zip Tie
(2) Stainless Bolts
(2) Stainless Washers
(1) 15 AMP Fuse

Install Notes:
Make sure you replace the included 15A fuse in the fuse box on the driver side under the dash. The ignition puts out more power than the factory 10A fuse can handle and it will eventually pop and your car will not start if it does. It is located from the driver seat by your left knee in the interior fuse box, top left, red fuse, #1 position.

We are sorry, but discounts are not available with this product.See more STM Parts


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Customer Reviews

Based on 9 reviews
Joshua Williamson (Virginia Beach, VA, US)
Stm evo 8 coil on plugs

Great product! Works great especially up in the higher rpm range. Fit under the factory cover.

Connor Hugo (Calgary, AB, CA)
Easy upgrade, great look

With the new coils installed the vehicle idles smoother, throttle response is quicker, and I'm finding less breakup at boost over 18psi regardless of ambient air temp and humidity.

chris tetrault
Stm c.o.p. kit

fits amazing and looks even better installation was super simply and directions were supplied with the purchase witch is super nice

Eduardo Gramajo (Oakland, CA, US)

Thanks for everything

Edgar Schuldeis (Edmonton, AB, CA)

Just got mine and love it big improvement compared to the stock one

Cancer and Reproductive Harm