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Ford Performance Spark Plugs (11-17 Mustang GT)

Item 399277
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$63.99 (set of 8)

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      Video Review & Installation

      Justin: If you're running forced induction or even nitrous on your modified 2011 through 2017 Mustang GT and are looking for a colder plug to help prevent detonation, well, then you might want to consider the Ford Performance plugs that we're talking about here today. Now, the plugs will be sold in sets of eight, they do come pre-gapped at 3500, and can be had off right around 100 bucks. So, right off the bat, guys, I do want to say running a colder plug such as this should come at the discretion of either your install instructions from your supercharger kit or at the discretion of your tuner and really aren't recommended for stock setups as there's really no need.Now instead, these are going to be for Coyote owners who have added boost either in the form of superchargers or turbos or even a nitrous setup and need to move into a colder plug to help prevent pre-ignition, otherwise known as detonation, which can occur under high cylinder pressures of a modified setup. Now, the Ford Performance options that we are talking about here today are the same exact plugs found in the dedicated drag car, the Cobra Jet, and will be one heat range colder compared to the factory plugs on your Coyote Mustang. Now they are going to feature a copper core along with the iridium tip, which will help deliver a consistent spark. Now, they do come pre-gapped at 3500 according to Ford Performance, but never a bad idea to double-check before you load them into your five-liter power plan.Also, guys, you can close that gap if needed at the discretion of your tuner, of course, to possibly help prevent any spark blow-up that could happen on cars running higher boost numbers. Shifting gears, let's get into the install. Honestly, guys, spark plugs are one of the wrenching basics I would say, and on the Coyote, they are very straightforward. So, I still gonna call this one a pretty soft two out of three wrenches on the difficulty meter, maybe a couple of hours to complete from start to finish. But now to give you a better idea of just how the job will go down, check out this detailed walkthrough and tool breakdown from an AM customer.Man: So, for today's install, we're going to be using a three-eighths socket wrench, a three-eighths extender tool, a one-quarter socket wrench, a one-quarter extension tool, a three-eighths ankle piece for socket, a five-sixteenths socket, a 10-millimeter, a 15 millimeter, a five-eighths spark plug removal tool. I would highly recommend using this over just the normal five-eighth socket but if you do not have a spark plug removal tool, it is possible to use this five-eighth socket. So, the first step is when we're working with any sort of spark or anything related to electricity, coil especially, I like to take the little battery cover off and do the simple battery removal where you can take the 10-mil. As simple as taking that off for safety and put this battery cover back on this just so it doesn't reconnect and we'll move on to the next step.All right, so next step, we're gonna take our 15-millimeter socket and we're gonna be removing the strut tower, strut bar, whatever you want to call it right here, and we're gonna start with 15 and just unbolt it, this should be four bolts in total. Take a little bit of force. You can see this come right off. Now, not every Mustang will have one of these but these are for those that do, mine does have one. All right, take that and move it to our pile and move over to next over here. Because on mine, mine only has one bolt on that side but it is two on his side. And unbolting this, real simple. All right, and the last one. After a little bit of force, it should just come right off. Perfect. All right, got it.All right, so we're just going to take the piece right there for now and remove the strut bar carefully and we'll set it aside. All right, so our next step, we're just going to be removing these five by four little plastic covers here to gain access to the spark coil packs. And it's real simple, you just kind of snap them off and just grab wherever you can and you'll be able to see the spark coil packs and just screw this off then. On the other side right over here, let's simply undo that. The next little challenge is to try to get these out of the way of the fuel rails and fuel lines and stuff like that but once you move out of the way, real simple, you now have access to all your spark coils and then we'll get to the removal of those.So, now that we've removed the covers right here to the spark coil packs, we're just going to start unscrewing this. I'm going to take our five-sixteenths right here and just start unbolting them. So, it's real simple. Four nuts...or four bolts for each side of the engine because it's a V8. Real simple, just simply unbolted that, unscrew until you can remove the screw. Just like that. Put it aside. And we'll do the same for all eight of the spark coil packs. Now, if you have a simple impact or just a regular drill that you have for the five-sixteenths, you can do it a lot quicker, but a simple socket set will do the trick, and just use your fingers to fully undo it. Just make sure you don't lose these down here by the headers. Perfect, and put it on there. Just use my finger. We've got this one in here. And for this one, I'm going to remove the extender tool just because the bar right here is in the way. And again, once it loosened up, let's put the socket back over here and just continue to do it with our fingers. Okay, I change my mind, it's not loose enough, it's not loose enough.All right, so now we have all four of our screws right here removed, so we have access to remove the spark coils. So, what we're going to be doing is we're gonna get a little bit closer right over here. These little white clips, we're just going to move them back a little bit so now they're not in like that. And then you simply just press down and it'll release. You just got to pinch that right there and just pull all these out. We're gonna do the same thing for all four of those, I'm gonna go put these aside. Unclick all of them. All right, just kind of after a little bit, they do this unsuction and they sort of come right up. That further back one is a little bit harder to reach because there's stuff in the way but this, I'm gonna remove. So, now we've got all this four side down. So now, if you do look inside right over here, you can see we've accessed our spark coils right there and spark plug right there. And we're just going to do the same thing on the left side and get access to all of them before we start changing.Get our socket again. All right, no more than that. Bolt number two. Now, ideally, you'd want to be doing this with your engine cool down for several hours just so that way you're not risking any burns. I've tried to let mine cool down for at least a few hours and it's worked a little bit because otherwise, this will be a very hot surface and your spark coils and your spark plugs will be very, very, very hot, you probably want to use gloves to remove those. But again, I'll unclip these just like we did on the other side. And just sort of pinch and remove and just take them all out. And these are quite warm. Perfect.So, we're gonna be using our three-eighths socket with the extender and the five-eighths socket removal tool too and a little bendy attachment just so we can reach all the way down there. Now, the ones closest to the actual cabin are going to be the hardest just because the bar is down there. It was so difficult to remove. All right, so once you've gone down there, you can use the sparkplug tool removal and start untwisting it. And the reason I would like to use a spark plug removal tool over the actual five-eighth socket, you'll see here in a second, there's a little piece here, sort of rubber or foam or something that keeps the actual spark plug on the tool. So, when we're removing it, it actually stays on that and we can just take it off from the actual tool itself instead of having to reach over down there and grab it while it's loose.Just like that, we've got our spark plug right there on our spark plug removal tool. And what I would suggest to get this off is some gloves but we're just going to take it out just like that, it is very hot. And I'll move on to the next one. And this next one, I'm gonna remove the bendy part just because we really need that just for the hard-to-reach ones over there. For this one, it'll be easy to reach so I'm just using the spark plug removal tool. We're gonna use this spark plug removal tool to put the new set of spark plugs in as well. And you know you've done unspinning because you can pull on it and it will come off. But until that point, you can just unspin it. Right now, we pull on it and it's right there. Take it out again, just put it off to the side, and rinse and repeat on what you haven't done. All right. It's coming right out. Now, again, I would highly recommend doing this, once you loosen it, just with a drill, just to save some time if you can. There it is. So, that side is done, I'm gonna go ahead and do on the other side.All right, so the same sort of thing, on the side, we're going back to the angle tool right here. This side is going to be the hardest one to reach. Kind of going down there as smoothly as possible, you got to work your way in there. It won't go down all the way. There we go. All right, now we can stick it on that socket right there. All right, so as you can see, I did have to remove the actual socket wrench from the socket in order to fit it at the right angle but just kind of do what you got to do right there until you feel it actually untwisting like a sparkplug and remove it and just stood it out. Like I said, this last cylinder back here is the most difficult angle to get at especially because the extender that I have is just slightly too long to make it easy. But make do with what you got. It's not coming out.Yeah, got it. All right. Yep, that one was so hard. Fantastic. So, now that we've done the hard ones, I'm just gonna remove this little bendy bit right there in the corner. Put the attachment, the angle attachment right there, and just continue what we've been doing for the last six cylinders, five cylinders. All right. Now, we're at six. Down it goes. And I know it doesn't seem like it but you do want to be gentle with the spark plugs as most of them are made out of ceramic for the most part and they can crack. So, you want to be careful especially when actually lifting it out of its cylinder. And the last one is...I'm gonna move that out of the way and we can see where the actual spark plug is when we're doing it down in that hole right there and just putting that in, kind of this spark plug tool. There it goes, and it should, like, sink down, that's how you know you kind of snapped onto it and then it'll be real tension and you just gonna snap the bolt. There we go. All right, got the last one out. Now, we can start to basically doing the opposite of what we just did and just start installing the new ones.So, as you can see, this is the old one that we took out, the old stock one. This is the new one. You probably can't really see it on video but if you look really close, there are very slight differences on the sizes and spaces and things right there at the very tip but these are the cold performance ones right here. Brand new and shiny, looks real good. It's gonna be a nice...hopefully, we'll feel a difference on, like, throttle response and certain things. Yeah, we're just gonna put these in the car. I'm gonna be showing you how to install some new spark plugs into your Gen 2 Coyote Mustang. It's gonna be a very simple job, just taking some of these spark plugs and spin them in, not too difficult to do, about 30 minutes to an hour job. Yeah, let's get started.So, now what we're gonna do is we're going to be taking our new spark plugs, doing the opposite of what we've been doing, put them back in instead of taking them out. So, what we're gonna do is kind of look right over here, we're going to just put this basically in there very carefully and you can just feel it kind of click in there. I mean, it's not gonna fall out. And then we'll probably gonna want to remove your actual wrench right there with your extender in order to fit and just kind of gently put that down into the cylinder. And just kinda feel your way in there and you can start to twist the stuff.And we can even just hand-twist it without using the socket wrench until you want to tighten it if that's easier for you, I'm finding it easier for me. Let me move my little cord around here. Tighten it. Just hand tighten it is good enough. Perfect. I'm gonna remove that again just because it's in the way. Just kind of undo it right there, and you'll see, no spark plugs there. It should mean it's tight enough in there. And we'll move on to the next one, so I'm just gonna take a little corner angle piece off there. Put another spark plug in here. Again, very carefully right there. As you can see, it's not falling out. So, if you are using just the five-eighths tool, I would highly recommend just getting the spark plug tool removal, it does make does make your life a lot easier instead of having to just kind of throw it down there and hope when you're installing these to know that it's attached and got peace of mind with that.Again, if you have a drill, I wouldn't use an impact on this as that would probably be way too powerful but if you have just like a hand drill, drill down there and then hand tighten it with the socket wrench. All right. Again, just putting the spark plug in the spark tool removal. And again, head down there and then just...I'm gonna just twist it with the extended piece. This seems to be doing a little bit faster than the actual socket wrench. All right, so I feel it's kind of stiff, I'm just gonna hand tighten it right there. Perfect. All right. And the last one for this side. Last one. Just look directly down into the hole. So, as you can see down there, you can see our new spark plug. That's how it should look. Again, just hand tighten this. Perfect. All right, that's that side done, we'll get to the other side.So, again, we are gonna be starting on the far side all the way towards the cabin. So, it is gonna be a little bit difficult to reach, so we're gonna be using the angle piece on our socket set right here. And just like we've been doing, down there, all the way down there, and you can start twisting and hand tighten it. You'll be able to hear it squeaking, that usually is a good sign of it's actually where it's supposed to be at. Perfect, and once you can't hand tighten anymore, just use this little socket wrench. I'm gonna make sure it's tight. All right. So, I'm just gonna be removing that angled piece just because we don't need it anymore.All right, we're getting our spark plug, going the wrong way. Just like that. And then you could be using a socket wrench for this, so I'm just hand tightening because I'm finding it a little bit quicker. Now, this is the same sort of process for most vehicles, it's just about finding where your spark coils are and how to get to them. For the 2.3 EcoBoost, I did a spark plug on that one as well. It is easier on that, just to get to them and there's less of them, less spark plugs, yeah, because it is just a four-cylinder and they're all just kind of lined over on the top and we can start by removing that cover.A real simple job, basic tools, not that hard. Shouldn't take you very long, probably 30 minutes to an hour, just depending on tools and temperatures and certain aspects like that and experience. Perfect. And the last spark plug. Go right in. Now if you'd like to, you can just go around again with a wrench and just kind of make sure they're all tightened. I'm not going to do that because I'm fairly confident with my tightening up skill but it's always okay to be on the safe side. All right. So, now that all spark coils...or spark plugs are in, we're gonna be putting the spark coils back in and we're just basically going backwards from what we were doing originally.All right, so I've got all of our spark coil lined up. Now, this is another modification that you can do at this time, I'm not, I'm just going to put the stock ones back in. If you do upgrade these, it will add a little more throttle response. I've heard good things about upgrading these, but today we're going to be putting back in the old ones. But, yeah, so we're just gonna be putting these back in the little holes where they go with the new spark coil...or the spark plugs in. You just kind of put them down there and they should suction right up and you can just kind of fold them back in as well. And I'm just kind of putting this right down there. This was always kind of awkward to just do anything with. There it goes. Perfect. Right here.Now, what you want to do, you just plug these back in. Push them in and clip them, make sure they're all clipped. You'll hear two clicks, one click means that the plug is actually back in and it's secured with that little white clip right there. And then we're just going to do the same thing on the other side and then we'll get to bolting them back in. Again, real simple install, something you can do, like I said, probably 30 minutes to an hour. If you's a fun little thing you can do with your kids if you want to get them interested in vehicles and modifying. Like I said, it's real basic and hard to mess up. So, those are all clipped in right there. And then we're just going to take all of our bolts and just bolt them back in, all right?We're going back to the quarter-inch socket with the five-sixteenth bit and we're just gonna be taking the old bolts and putting them right back where they came from. And that'll be the coil packs tightly back into place where they were. So, you just kind of want to finger tighten it until you can actually, like, use the socket. Again, it's good to use a drill for this, make it a little bit faster. You absolutely do not have to. Perfect. It doesn't have to be too tight, just so it's secured. Perfect. And the hard-to-reach one back here. Another not bad idea would be to use just some disposable rubber gloves just so you don't have your hands look like mine all day and you have to wash it four or three times. Perfect, that one's secured. So, what we can do now is we can take this little plastic "Powered by Ford" covering and put it right back on where it was, it should just click right back into place and that's secure like that.Now, back onto the other side, I'm gonna take our bolts, and we just kind of put them back in there. Again, just making sure everything is secure. I almost dropped that one. Not yet. I'm just finger tightening all of these right now and then I'll get them secured with the socket wrench in just a second. So, that's all tightened down there and we're just going to be putting this Ford plastic covering thing back where it went. Again, I'm just gonna kind of maneuver it back down there underneath these lines right here. All right. Perfect. And then just kind of snap that into place. All right. And so now, the only thing left to do is put back the strut tower and we'll be all reassembled. Oh, and the battery, we'll put the battery back in, and then plug that back in and put the strut tower back in.So, we're just gonna be putting back the strut tower, so we're gonna find these two bolts right here and this one right there and I'm just gonna be simply placing it right back on over there and it should just go into place and then we're gonna take our three bolts. I have three, you would normally have four if you do have this. I had four but one of them stripped because I use an impact to take it off one time and it didn't like it. So, we have three. And then, guys, we're gonna take our 15-millimeter socket and just kind of tighten them, just kind of tighten them. Perfect, and the last one on the other side. So, again, it would help if you have sort of the longer socket for the 15-mil just because the standard shorter length ones are not long enough to get this bolt all the way down under the battery.All right. And now, took the battery cover all the way back off. And I'm not sure if everybody has this but I have this little brown thing here that goes kind of right onto that bolt but we just plug that in and then we're gonna be simply plug in our battery. Back there, you can hear everything. It's going to go back into place and we're gonna be tightening that up with our 10-millimeter. We're gonna take our 10-millimeter and we're just tightening that all the way back down. Perfect, and then you just want to put this right back on there and that just to make sure it doesn't move around too much in transit. Don't worry about this wire, this is aftermarket parts that I have personally. I will be just replacing that after this video. Put the cover back on.Justin: So, if you are looking for a colder plug on your boosted GT, then be sure to check out this set from Ford Performance right here at

      Product Information

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


      • Perfect for Aftermarket Superchargers
      • 0.035 Spark Plug Gap is Recommended
      • Comes With An Iridium Tip For Stable Constant Spark
      • Reduces Emissions And Improves Fuel Economy
      • Comes With A Heat Range 7
      • 14mm Threaded Pattern Construction
      • Available As A Set Of 8
      • Easy And Direct Installation
      • Limited 2 Year Warranty
      • Fits All 2011 To 2017 GT Mustangs


      Improved Performance. Replacing the old weak stock plugs with the superior Ford Performance Spark Plugs is an easy and effective means of ensuring that your supercharged Mustang engine continues to deliver high performance, runs smoothly as well as efficiently. By offering a reliable constant spark, the plugs are proven to provide improved fuel efficiency, throttle response, lower emissions as well as reducing fouling.

      High-Quality Construction. The Ford Performance Spark Plugs come with a copper core electrode which offers superior conductivity with an iridium tip which is 6 times harder than platinum. This tip is perfect for delivering a constant peak engine performance as it has an extremely high melting point. Additionally, the tip comes with trivalent metal plating that offers superior corrosion resistance as well as anti-seizing properties.

      Installation. The Ford Performance Spark Plugs allows for an easy direct fit replacement that does not call for modifications. With the use of simple hand tools and light mechanical skills, anyone can complete the installation in about 2 hours.

      Warranty. Ford Performance gives a guarantee that the Ford Performance Spark Plugs are free from material and workmanship flaws and also offers a 2-year limited warranty on the same.

      Application. The Ford Performance Spark Plugs are designed and engineered to be compatible with all 2011 To 2017 GT Mustangs that is equipped with an aftermarket supercharger.



      Ford Performance M-12405-M50A

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

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      • (8) Spark Plugs

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        • GT - 11, 12, 13, 14, 15, 16, 17

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