(approx) 1 Hour
Light to Moderate mechanical skill required.
Hey, guys. Today, we're gonna be taking a look at and installing the GMS 4-Valve Street Fighter Coil Packs for 2011 to 2014 GTs and 2012 to 2013 Boss 302 Mustangs. These are a direct-replacement, high-performance upgraded coil pack option for the 4-valve Coyote. These outperform the stock coil packs. They deliver a stronger, hotter spark. They'll cost about $330 for a full set of eight, and they're very easy to install. I'll call it a one out of three wrenches on the difficulty meter, and I'll show you how to get these on the car now.For this install, we used a 3/8 drive impact gun, an extension, and an 8-millimeter socket. Okay, guys. So your coil packs are located right here, actually under this cover. In order to get this cover off, we do need to remove this little PCV line right here. It is connected to your intake. There are a couple different ways you can do it. Basically, what I'm gonna do is I'm gonna disconnect it from the intake, then I'm gonna rotate around so we can actually get to the tab here on the valve cover.So there is going to be a gray tab. I feel for the gray tab. I'll push down on the gray tab, then it'll release. Now, I'm going to rotate this so I can actually have access to the tab on this side right here. I'll press the tab, and then this will release. All right. With that out of the way, we can pull our cover off. So this cover just pulls off, so we'll go ahead and grab it, wiggle it out of place.And these right here are your coil packs. They're held in by an 8-millimeter bolt. All right. So we'll pull up on the red tab, then there's a little black bar here. You'll push the black bar in, and then this will release. So we can actually go ahead and disconnect all of these now. So we'll pull up on the red tab, push down on the black bar, pull up, and it'll release. All right. From here, we'll grab an 8-millimeter socket and then remove all of the bolts. All right. So we'll back out the bolts. And with the bolts removed, the coil packs will pull right out of place.So here are the GMS coil packs compared to your factory coil packs. Obviously, I only have one side out on the table here. You guys will be getting a full set of eight in your pack. They actually look pretty identical other than the color. You guys can see the GMS coil pack versus your factory coil pack.So these are gonna be ideal for stock or slightly modified Coyotes. They are made of silicone wrapped around a magnetic core and they have zero ohms of resistance. They're stronger than your factory coil packs are. They can produce 42,000 volts while your factory coil packs can only produce 20,000. With these installed, most people notice a smoother idle right away. Sometimes, you get an improvement in miles per gallon or even throttle response.With all that being said, let's go ahead and get these installed in the car. All right. So the coil packs are not cylinder-specific, so we can just go ahead and slide a coil pack into any cylinder. What we're looking for here is to hear it click into place over the spark plug though, so we'll go ahead and push it down into place, and I can feel it seat into place. So we're just gonna go ahead and do that for all four of our cylinders on this side.All right. Then we'll grab our factory hardware and get these bolted back down. All right. Now, I'll go ahead and get these tightened down. Then we'll reconnect our electrical connections here, so we'll slide the plug in place. You guys heard it click. Then we'll make sure the red tab is pushed down too. Once again, we'll slide it into place, wait for it to click, push the red tab down. And then we can grab our cover, slip the cover back into place, and then grab our breather hose. And we'll connect it on the valve cover first and then on the intake. The install is gonna be exactly the same on the other side.All right, guys. That's gonna wrap up this review and install. Keep in mind that you can always check these out more online. I'm Stephanie, and for all things Mustang, keep it right here at americanmuscle.com.
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Features, Description, Reviews, Q&A, Specs & Installation
Fitment: 2011 2012 2013 2014 Details
CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
October 07, 2018
Easy install great packs runs much better no hesitationHelpful (2)
August 13, 2018
Increased mileage per gallon
Installed these coils with a new set of NGK plugs. Installation time took about 2 hours. Installation fairly easy. HINT: NUMBER 4 CYLINDER (right side most rearward cylinder) IS A LITTLE CHALLENGE DUE TO THE BATTERY BOX. EASIER IF YOU REMOVE THE BATTERY AND BATTERY BOX. 15 MINUTES ADDITIONAL TIME. MAKES THE CHANGING OF THE COIL SO MUCH EASIER. This is not a seat of the pants performance gain modification. Just looking for a small gain in mpg. Did the same modification gain to my 2015 Escape with a 2.0 Eco-boost. Picked up 3 miles per gallon on the highway. Plan to take the GT/CS on my next trip to Yakima WA. Expecting a 2 mpg during the trip. So far I hav notice a smoother idle, and easier start up.Helpful (5)
July 07, 2018
tune up time
coil pack fit very well and look nice. Only concern is plugs dont lock on like they did on the stock coil packs. I havent noticed any performance gains yet, but maybe will see a increase in mpg in time, being to soon to tell.Helpful (3)
May 11, 2018
Stocks are good but GMS are better
People are skeptical about this swap but the performance gains are noticeable. Im not sure if the extra park just cleans out the chamber from build up but the engine feels great. I would say you gain some power and lose a little mpg. The throttle response is much better and the exhaust is a little louder. My GT is at 33K miles so I installed these with stock spark plugs. Get these for a happy engine.Helpful (3)
April 27, 2018
Terrible don't buy went out in less than a week deeply disappointedHelpful (6)
March 08, 2018
This seems like a solid set of coils. I have had no issue with them in the last 2 months and the install was a breeze. Overall the performance gain is minimal, the idle is smoother. Its just a peace of mind install after a stock coil died. If you are looking for price to performance, don't get these. You will not feel any gains from these other than a smoother idle.Helpful (5)
January 14, 2018
GMS 4V Street Fighter Coil Pack
I installed these GMS 4V Street Fighter Coil Packs with new spark plugs. The Mustang idles nice and smooth and packs a punch on the acceleration. I noticed a big difference in performance.Helpful (4)
December 30, 2017
Hotter is Better
I bought these street fighter coils because I'm always looking for more HP and my car has started lagging on start up, and it fixed that ! My car use to spend when I slammed the pedal at a 25 mph roll on a 275/40/19 tires but that stopped once I went to 305/35's I shouldn't complain because I'm putting the power down, but I missed it ! will it's back with these coils ! I did acouple of pulls and red-lined it twice so watch your rpms cuz it revs up fast and I'm running tall gears 331s, I love these coils.Helpful (3)
December 04, 2017
They worked very works better at higher rpm betterspark for my nitrousHelpful (3)
October 20, 2017
GMS Coil Pack
So far so good. Be sure to check the heat range of you spark plugs and use anti seize. As you add power to your 5.0 build it will require a colder plug. The car seems to Idle better and has a quicker response. I have not had a chance to test drive it due to other work that I'm doing.Helpful (4)
What’s the warranty on these coil packs?
This comes with a limited one-year warranty from the manufacturer.
When it says a “smoother idle”, i may sound dumb but what exactly does that sound like? To me with my set up my idle sounds smooth, i just want it to be louder, kind of confused me when it said smotther idle.
The GMS 4V Street Fighter Coil Packs will not change the sound of your Mustang, it will change the way it runs. Sometimes with other Coil Packs idle will jump around, these will be more consistent and fluctuate less.
Will the stock plugs work with these gms coils or do you recommend something else my car has 37000 miles
Stock plugs will have no issue working with the GMS 4V Street Fighter Coil Pack. At 37,000 Miles, your stock plugs have plenty of life left in them.
Do these work on the s550 5.0s because I see others in the reviews with submodels that are 2016 so do they work or don't?
We can not guarantee fitment on the S550 Mustangs. We recommend the GMS 4V Street Fighter Coil Pack only be used with 11-14 S197s.
Does GMS recommend a specific spark plug gap for these coils?
There is not a specific plug gap recommended to be used in conjunction with this GMS coil on plug kit, we would recommend the use of the factory plug gap specifications.
These GMS 4V Street Fighter Coil Pack are designed for 2011-2014 Mustang GT's and will not work with 2015-2017 models. In regards to spark plugs, we would recommend the NGK Laser Iridium Performance Spark Plugs, Item 64062 which are an ideal upgraded replacement. http://www.americanmuscle.com/ngk-iridium-3789.html
The GMS 4V Street Fighter Coil Pack fits 2011-2014 GT & Boss 302 Mustangs, it will not fit a 2017 GT.
The GMS 4V Street Fighter Coil Pack (11-Early 16 GT, BOSS) will not require a tune however a tune would be more beneficial. The GMS is a great brand, one of the best for coil packs.
(approx) 1 Hour
Light to Moderate mechanical skill required.
What's in the Box
Intended for 5.0L Motors Built Before 2/23/16.