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Accel Super Coil Packs; Yellow (99-04 GT)

Item 37222
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      Review & Installation Video

      Hey everyone Justin here with, and I’m checking out Accel’s super coil on plug kit for all 99-04 Mustang GTs. Accel has been in the performance ignition game for well over 40 years, and continues to produce parts that aim to squeeze every ounce of horse power out of your car, whether it’s a weekend cruiser or an all out drag strip monster. These Accel coils give your modular motor a spark that is 10-15% stronger than your OEM coils by using a specialized magnetic steel core, optimized winding, resistance and turn ratio, this basically equates to a hotter, stronger spark, which gives you more horsepower and better fuel economy. This is extremely important to those of you looking to get the most out of your motor, but may be dealing with old faulty OEM coils, possibly resulting in a misfire. Alright I know what you’re thinking, get to the good stuff already, gotcha. Ultimately we want to see what kind of improvement these coils will make on our GT, but before we do that let’s get a baseline number down and see what we’re working with. So our baseline run on our 2000 GT gave us 221 horsepower and 261 ft/lbs of torque. Now let’s get those stock coils out of there and install our Accel units. Install is very simple and should take you about 30 minutes using standard hand tools, I will advise you to disconnect your battery first and then go ahead and remove your intake tube, that way you can access everything a whole lot easier. You will need to grab a 7mm socket, and remove each one of your coils individually replacing them with the Accel units. So now we have everything installed here back at the shop we’re going to run the car once again on the dyno and see the improvements this kit made on our GT. So with our Accel coils installed we put down a total of 220 horsepower and 267 ft/lbs of torque, now while we didn’t see any peak horsepower gains from the coils, we did manage to pick up 7 horsepower and 11 ft/lbs of torque throughout the curve. Let’s face it, getting old stinks, especially when it comes to critical components pertaining to your ride, your factory coils are a great example. As they age they have a tendency to fail, resulting in loss of power, worse fuel economy, and ultimately a poor running vehicle. This kit from Accel is a great way to make your modular motor feel young again for a fraction of the price of new OEM coils.

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • 10-15% More Energy Than OEM Coils
      • More Horsepower
      • Direct Bolt-On
      • Kit Includes (8) Coil Packs
      • Designed for 1999-2004 SOHC Two Valve GT's


      More Horsepower. The Accel Super Coil On Plug Kit makes more power then the wimpy stock OEM factory coils to help produce more horsepower from your modern SOHC modular motor and are a perfect match for stock engines and engines with minor performance upgrades. Curve gains of 7 HP and 11 TQ has been seen on a Stock Mustang with a 93 Octane Tune.

      Superior Design. Accel coils feature an advanced bobbin technology, highly specialized silicone magnetic steel cores, along with optimized winding, resistance and turns ratios to delivery 10-15% more energy than the stock OEM coils. More energy equals a hotter spark that burns fuel more completely releasing all it's potential energy translating into better fuel economy and more power that you can feel.

      Application. These Accel two valve Super Coil On Plugs are designed as a direct performance replacement for the 1999 to 2004 SOHC GT Mustangs.

      Fitment: 1999 2000 2001 2002 2003 2004

      Accel 140032-8

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (100+)

      Write a Review

      Ratings Summary

      4.7 out of 5 overall rating from 100+ customers

      Installation Time: Less than 1 Hour

      Installation Cost: 0-$100

      • May 11, 2020

        2 2002 GT - RatedZ Installation Time: Less than 1 Hour

        STAY AWAY

        You get what you pay for with these coil packs. They only offer a 90-day warranty for a reason. Suggest, getting part store lifetime warranty brand or Ford OEM instead of these Accell yellows. They cause misfires and can handle much less pressure and tolerance vs OEM. Not to mention, had two coil female connections break off when switching back to OEM.

        Helpful (0)
      • April 25, 2020

        5 2004 V6 - shaker56 Installation Time: Less than 1 Hour


        I bought the coilpacks 3 years ago from American Muscle and i have not had any problems so far they are a quality product at a great price. American Muscle sell quality parts at great prices and the parts outlast there warranty and there shipping is FAST

        Helpful (0)
      • January 24, 2020

        5 2001 GT - SamuelT Installation Time: Less than 1 Hour

        They work beautifully

        They shipped fast and the help department was awesome and had all the answers to my questions

        Helpful (0)
      • December 23, 2019

        5 2002 GT - Lorie Installation Time: Less than 1 Hour

        Looks great

        Thought I was going to put alot more mo ey out to fix my car. Replaced t all the coils, runs great now.

        Helpful (0)
      • October 04, 2019

        4 2001 GT - TheBaron Installation Time: Less than 1 Hour

        Hit Or Miss

        When you get a good batch, they work just fine. As good as the more expensive OEM coils. Though, I have found that the defect rate is higher than the OEM coils. I had one die out after only 30 days and on another set I purchased, one was DOA.

        Helpful (2)
      • August 24, 2019

        4 2004 GT - AdamP Installation Time: Less than 1 Hour

        So far so good

        There are some bad reviews for these coils, decided to give them a try they're the best value I could find. Have had them installed for a few months now and they work great. Can't say I've noticed a considerable power improvement aside from restoring lost power from old failing stock coils

        Helpful (3)
      • July 10, 2019

        5 2002 GT - dreNtif Installation Time: Less than 1 Hour

        Worth it!

        3 years since installing these. They've had great performance so far!

        Helpful (2)
      • April 15, 2019

        5 2001 GT - JasonM Installation Time: Afternoon

        Works great

        Works great so far. Took a few hours. Had a slight miss fire before this eliminated it.

        Helpful (1)
      • April 03, 2019

        5 2001 GT - Michael Installation Time: Less than 1 Hour

        Coil packs Accel

        Car runs smooth and idles a lot better and the pedal response is a lot better!

        Helpful (0)
      • March 14, 2019

        5 2000 GT - KristopherH Installation Time: Less than 1 Hour

        2000 gt

        Replaced old plugs with Ford Motorcraft and these Accel packs, bout an hour to replace all 8, it's a 2000 gt, 4.6 around 126,000 miles, it was time to upgrade the electrical, really impressive, no hesitation

        Helpful (2)

      Questions & Answers (17 answers)

      5 Top Rated Questions

      What spark plugs are needed with super coils When buying super coil-on-plug kits, is a stock or stock replacement spark plug OK? Or do you need a special plug because of the higher voltage?

      • I put in factory motorcraft spark plugs when I put the coils in and it's been about 5 months car still runs strong as when I first put'm in. Hope this helps.

      Helpful (6) Show 3 more answers

      do I need to order wires with this item?

      • 99-04 dont have plug wires you just have plugs and coil packs

      Helpful (5) Show 3 more answers

      Alternator upgrade needed? is it a "wise" choice, or a "must have" choice to upgrade alternator also? I do know i got a bad coil and need new ones, but if i get them and later on upgrade alt. will the new coils put more strain on stock alt?

      • I'm not sure about a "wise" choice, but we kept the stock alternator, drove 1600 miles through the mountains and had no issues at all (not "must have").

      Helpful (1) Show 1 more answer

      What's the life expectancy of this product? I bought the same exact ones and installed them 50K later, 1 COP has failing/failed.

      • It can really depend on several factors. We recommend checking with the manufacturer.

      Helpful (0)

      Would these work well with the go iridium spark plugs and if so would I need to gap the spark plugs or do anything like such as tuning or gapping or anything like that

      • These will work with the NGK Iridium spark plugs. You would keep the same gap in the spark plugs as factory.

      Helpful (0)
      Post Your Question
      10 More Questions
      Hey guys, will these Accel coil packs work on my 2001 mustang gt 4.6 DOHC motor? 1 answer
      Hey guys, my question is, Will these Accel coil packs work on my 2001 mustang gt 4.6 DOHC? I'll be waiting on your answer. Thanks! AL 1 answer
      Will this work on my 2001 4.6l v8 mustang gt 1 answer
      My factory coil pack is going out and I was wondering if I can buy these to replace the factory one or do I need to buy something or upgrade anything else to make these work? 1 answer
      How much voltage are these coils from the stock ones? 1 answer
      Hello. Are these smog legal? 1 answer
      Hi I replaced my spark plugs at 96k on my 2001 gt my car now has 97k should i replace the coil plugs? I don't think my factory ones are bad but if I can get better performance I would do it 1 answer
      Will these coils work on a 04 150 with a 4.6 engine are they the same engine thanks wanted to put them in my truck also have them in my mustang and love the performance 1 answer
      Is there a warranty on this product 1 answer
      Will these work on a '98 4.6L? Searched for something similar but nothing really came up 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (8) Coil Packs

      Tech Specs

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