(approx) 2 Hours
Light to Moderate mechanical skill required.
- Customer Submitted:
- How to install Ford Motorcraft OEM Spark Plugs on your 2008-2010 GT Mustang
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Hey, everybody. Alex with americanmuscle.com. Today, I'm bringing you my quick review and breakdown of NGK's Laser Iridium spark plugs, fitting your 2011 through 2017 GT and a '12 and '13 Boss 302. So NGK's Laser Iridium performance plugs we're taking a look at today is going to be a great option for any '11 through '17, or Boss 302 owner out there that's looking for a great replacement plug or an upgraded plug, which can range for a stock or a mild bolt-on build.However, I'll throw it out there that if you're running any type of forced induction at all, maybe a small shot of nitrous, I would suggest checking out NGK's 9 Series plugs, as they're going to be a step cooler. I'm going to explain the heat ranges a little bit more, coming up soon. So I will throw it out there that no matter the manufacturer of the spark plug that you're looking at, heat ranges are going to be all over the place. NGK's is a little bit backwards, for lack of a better term or explanation, because the higher the number will yield a cooler plug. But being said, NGK's Iridium plugs that we're taking a look at here today will be a step hotter than the plugs that I have previously mentioned. That nine heat range is going to be great for a forced induction or a car that's running some nitrous. However, these are going to be at a heat range of six, which is going to be perfect for a stock or a mild bolt-on car. Now, by getting into a set of fresh plugs or an upgraded set like we're looking at here today, you're essentially going to be making your Coyote work that much more efficiently. While it's advertised that spark plugs can help your fuel consumption, with a 400-plus horsepower car, it's really not something that you're going to notice just based on how you're driving, as well as the age of the car. Now, the great thing about doing plugs is that they're not going to install with that much effort. For that, we'll be giving them a very easy one out of three wrenches on the difficulty meter, and about an hour for the labor with basic hand tools. Now, in terms of what makes these what these are, or just a spark plug in general, we're going to see that it's going to feature an iridium disk, which is essentially going to be welded on the center electrode, and then a platinum disk which is then going to be welded on the ground electrode. Now, these are going to be one of your more pricier plugs out there, but that's going to be due to the fact that it will be coming with very premium materials. In turn, you should expect to get about 50,000 miles of use out of your plugs. Now, at the end of the day, in English here, guys, what that's going to translate to is going to be a much happier and healthier Coyote, one that's going to heat up a little bit faster. In some instances, you might even see an improved idle and one that's going to be geared towards a stock or a mild bolt-on Coyote. Now, with premium materials and that NGK name, this is not going to be something like you'd find at your local gas station right off the shelf. You should expect to be spending about $115 to get into this set. Now, in my humble opinion, that's a really small price to pay to ensure that your Mustang is going to be running at 100%. Again, I'll throw it out there one last time that when you're shopping for spark plugs, you really need to pay close attention to the manufacturers' heat ranges, because it will change from brand to brand. Now, switching gears to the installation portion of the video. Just like I had said off top, you're looking at a very simple one out of three wrenches on the difficulty meter here, and about an hour's worth of labor, or maybe less if you've pulled your plugs before. But looking ahead, some things I'd make sure to have on hand here would be a basic socket set, a long extension, and then a torque wrench. So I'm Alex and that's my quick review and breakdown of NGK's Laser Iridium spark plugs, fitting your 2011 through 2017 GT, and the '12 and '13 Boss 302, which can be found right here at americanmuscle.com.
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Features, Description, Reviews, Q&A, Specs & Installation
Fitment: 2011 2012 2013 2014 2015 2016 2017 Details
CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
(approx) 2 Hours
Light to Moderate mechanical skill required.
What's in the Box
April 29, 2020
NGK LASER IRIDIUM spark plugs..
Amazing plugs, feels like power was restored immediately.. Thanks for the fast shipping as well AmericanMuscle !Helpful (0)
April 03, 2020
SMOOTHER IDLE WITH PEPPY TAKE OFF ALONG WITH OTHER MODS YOU NEED THE BESTPLUGS. EASIER INSTALL THEN I THOUGHT IT WOULD BE. NGK'S THE BOMB. CAME PREGAPPED FOR LESS WORK. YOU'LL BE GLAD YOU GOT THEM.Helpful (0)
March 28, 2020
Amazing quality . 1 hour install, car feels different when turning the ignition onHelpful (0)
March 02, 2020
Great set of spark plugs
Easy to install pre gapped made it even easier it was pretty fast to install in my 13 gtHelpful (0)
December 31, 2019
Great product, gives me piece of mind knowing I have a great set of new spark plugsHelpful (0)
October 28, 2019
Brought back lost power instantly on my 2012 GT/csHelpful (0)
September 19, 2019
A must have for your coyote
Increased throttle response and better gas mileage. At 60k all my stock plugs were needing a refresher!Helpful (2)
June 12, 2019
Worth the price
Completely changed how my car runs. Well worth the extra money.Helpful (1)
May 10, 2019
Perfect plug for NA!
These Laser Iridiums are the perfect plug for naturally aspirated. Purchased my 2017 Mustang GT Premium Performance Package in Jan 2017. A few days ago it occurred to me that I haven’t changed out the plugs since owning the car! (Ouch)! I’m always on top of things and felt negligent in a major way! I began to research of what plug would best suit my stang and came across the NGK Laser Iridium Premium. Rated @ Heat 6 for Naturally Aspirated. I put the order in! Once, I received them, I couldn’t wait to install and swapped out the old plugs! When finished, I started her up and noticed instantaneously a much more smoother start, idle w/a cleaner tone. I took her for a test drive and definitely noticed a CRISP/CLEAR response! Of course w/the help of 112 octane mix. I would definitely recommend these NGK Laser Iridium plugs that offer a perfect balance to the performance especially when it comes to fuel efficiency! Excellent Plug!Helpful (5)
May 10, 2019
Nice bang for buck
These performed so well after removing my old burnt plugsHelpful (0)
Are these plugs good for a full bolt on mustang gt running on e85?
The NGK Laser Iridium Performance Spark Plugs will be the OEM heat range and will work well with most bolt on cars, however without knowing the exact modifications done, it is hard to say what would be the best plug for a given setup.
Can you install these spark plugs on a stock 2014 mustang GT?
The NGK Laser Iridium Performance Spark Plugs would be directly compatible with your stock 2014 Mustang GT!
what is the Torque on these plugs?
These spark plugs would be torqued to 133 lb.in (15 Nm). The spark plugs should be installed on an engine that is warm to the touch, but not hot or cold, to prevent damage ti the threads in the head.
For a 2014 GT... what is the factor set spark plug gap? Also, what gap would be recommended for these new spark plugs to go with my new Pro Street Series High Performance Coil Packs, K N Series 69 Typhoon Cold Air Intake, and my Bama V2 Performance Tune? Thanks!
The 2014 OEM gap specs are 0.049"-0.053". We typically recommend gapping them to factory specs, however, since you do have some modifications added we would recommend reaching out to your tuner as they would be able to let you know what your new spark plugs need to be gapped to.
These spark plugs were replaced by the NGK LTR6BI-13 right? The NGK website says that the stock #3789 are not made anymore.
The ILTR6A-13G has been replaced by the LTR6BI-13 plug.
If the current spark plugs are old or beginning to wear, we would recommend replacing them. Since you are changing the coil pack, we would recommend a new set of spark plugs as well, to ensure the most "bang-for-your-buck" of out the coil pack. The NGK Laser Iridium Performance Spark Plugs would be a great choice to maximize efficiency.
We always recommend checking with a performance shop or your tuner to confirm which will be best for your current setup.
Spark plugs do not require a retune, however with those modifications, you would be way better off with stock replacements. I would suggest these only if you were heavily modified. With just a few bolt ons, stock replacements would do you better.
If you have it, we would suggest putting it on, but it would not be required.
They need to be gapped upon arrival, they do not come pre-gapped.
These are expected to last about 50,000 miles.
Yes, these products are really a "don't fix it if it ain't broke" kind of thing, unless you're modifying your Mustang adding significant upgrades that would require updating these items. If you do need replacement spark plugs, unless you are heavily modified or have a boosted application, you would be better off with stock replacements.
Our products are tested and recommended for US-spec vehicles only. We cannot confirm if these will work with Euro-spec models.