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NGK Laser Iridium Performance Spark Plugs (11-17 GT; 12-13 BOSS 302)

Market Price $139.99 You Save 14% ($20.00)
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$119.99 (set of 8)

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  • Item 64062
  • MPN#91725

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    Features, Video & Details

    • High Performance Replacement
    • Improves Fuel Economy and Lower Emissions
    • Heat Range: 6
    • NGK Part# ILTR6A-13G; NGK Stock# 3789
    • 14mm Thread Pattern
    • Fits 2011-2017 GT and 2012-2013 BOSS Mustangs
    • Sold as a Set of 8

    Review & Installation Video

    Review & Install Video

    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.

    Regular Maintenance. Replacing your old weak spark plugs is paramount to keep your engine running smoothly and efficiently, so why replace them with the same old sub-par stock plugs when high performance plugs from NGK will improve fuel efficiency and lower your emissions.

    Superior Construction. NGK Laser Iridium Performance Spark Plugs feature an iridium disk that is welded on the center electrode and a platinum disk that is welded on the ground electrode to reduce the wear rate of both surfaces ensuring greater durability and longer life. NGK uses pinpoint precision laser welds to reduce excess debris decreasing the required voltage to bridge the spark gap for a more efficient burn.

    Application. This set of eight (8) NGK Laser Iridium Performance Spark Plugs are specifically designed as a direct fit replacement for the 2011 to 2017 GT and 2012-2013 BOSS Mustangs equipped with the 4 valve 5.0L coyote engine.

    Fitment: 2011 2012 2013 2014 2015 2016 2017 Details

    What's in the Box
    • (8) Spark Plugs
    Installation Info
    Tech Specs
    Will it fit my Mustang?
    • Boss 302 - 12, 13
    • GT - 11, 12, 13, 14, 15, 16, 17

    People Who Bought This Item Also Bought

    Most Helpful Reviews

    4/5
    Motorcraft Iridium Spark Plugs as stock

    NGK no doubt is more well known brand. But after I swap the stock plugs out then I found out those Motorcraft Plugs are iridium plugs as well. Also made in Japan. Overall I don't feel significant difference ...

    Read More
    Helpful (8)

    5/5
    NGK Laser Iridiums Performance Spark Plugs

    I installed these before a business trip from San Francisco CA to Scottsdale AZ. I saw an immediate change in my throttle response and gas mileage. Definitely worth it.

    Helpful (4)

    Overall Rating 4.7 out of 5 stars
    Read All 25 Reviews

    Customer Photos

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    13 Questions / 5 Answers

    Ask a Question

    what is the Torque on these plugs?

    JoeP

    • 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.

      Rob D

    Helpful (1)

    do these need to be gapped?

    kyleg

    • These spark plugs come pre-gapped, however, for any spark plug that is brand new it is always recommend to double check plug gap before installation.

      AMjordan

    Helpful (0)

    Would i have to gap these spark plugs?

    DiegoB

    • The spark plugs do come pre-gapped but it is recommended to check plug gap before installation to ensure proper vehicle operation.

      AMjordan

    Helpful (0)

    These have a heat rating of 6. How does this compare to the heat rating of factory 5.0 coyote plugs?

    THARUNUP

    Do they also fit my 2015 mustang V6? Or what is the best option for my vehicle?

    RickyH

    • These NGK Laser Iridium Performance Spark Plugs will not work with your 2015 Mustang V6. These spark plugs are specifically intended for use on the 11'-17' Gt and 12'-13' Boss 302.

      AMKody

    Helpful (0)

    Are these a good replacement for the factory spark plugs (2015 GT)? The car is completely stock, they'll be replaced as part of the tune up.

    ChrisS

    • The NGK Laser Iridium Performance Spark Plugs would be good replacement spark plugs for a mostly stock vehicle.

      pserafi

    Helpful (0)

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    Customer Reviews (25) Write a Review

    Overall Rating 4.7

    out of 5 stars

    Installation Time:Afternoon

    Installation Cost:0-$100

    • Performance Gain 3.708333 3.7
    • Fit 4.92 4.9



    • 4/5

      Installation Time: Less than 1 Hour

      November 26, 2013

      Motorcraft Iridium Spark Plugs as stock

      NGK no doubt is more well known brand. But after I swap the stock plugs out then I found out those Motorcraft Plugs are iridium plugs as well. Also made in Japan. Overall I don't feel significant difference between NGK & stock plugs. I believe they are better than stock plugs but maybe not that much. If I know it before I might not change the plugs now and wait till later. Just my 2 cents.

      Fredrick

      Year: 2014 Submodel: GT California, USA

      Helpful (8)

    • 5/5

      Installation Time: Less than 1 Hour

      July 26, 2017

      NGK Laser Iridiums Performance Spark Plugs

      I installed these before a business trip from San Francisco CA to Scottsdale AZ. I saw an immediate change in my throttle response and gas mileage. Definitely worth it.

      AlbertoJ

      Year: 2014 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      August 21, 2013

      Plug install

      Overall the install was seamless. Out with the old and in with the new. I have had the car for a year and it is always my routine to change plugs every year regardless if they need it or not. These plugs were on sale so I bought them. Good quality construct with good fit. I would recommend them for all.

      JDeso

      Year: 2013 Submodel: GT Las Vegas, NV, USA

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      February 20, 2017

      Amazing spark plugs

      These spark plugs is the best choise for your Ford Mustang(11-17 GT; 12-13 Boss)

      MustangOwner

      Year: 2013 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      January 13, 2017

      Great product!

      Shipping was very fast, as usual. All plugs were gapped correctly. Install was very easy. Just make sure you have plenty of extensions to get down to the plug and remove the negative cable from your battery prior to swapping out the plugs, or you will have an issue when removing the plug closest to the battery. I notice a slightly better performance gain, and my car seems to start better and warm up a little quicker.

      HSVGT

      Year: 2013 Submodel: GT

      Helpful (3)

    • 4/5

      Installation Time: Afternoon

      December 18, 2014

      NGK Sparkplugs

      You always get what you paid for and these spark plugs are no exception. Car warms up a little bit faster but did not really feel any performance gain. They were a fairly easy product to install. Gas mileage did not increase nor decrease. I got lucky that I did not break any of my old ones. I would definitely recommend these spark plugs for anyone that wants to do better than OEM.

      xsteadyx

      Year: 2012 Submodel: GT Houston, TX

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      November 14, 2013

      Good Plugs

      Overall im very happy with these plugs, I like the fact that my cars warms up faster at cold start up.

      2014CS

      Year: 2014 Submodel: GT Fort Worth, TX, USA

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      August 23, 2017

      power

      these plugs are power in a box way better than stock plugs more tourque. great product customer service is as always great

      KevinH

      Year: 2011 Submodel: GT

      Helpful (2)

    • 4/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      August 04, 2017

      Noticeable difference

      I bought these for my 2012 GT, mainly because of a slight rough idle. These have really solved that issue, as well as generating a smoother acceleration. I'm very happy with my purchase.

      DiegoE

      Year: 2012 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      June 18, 2017

      tune up for dyno day

      Plugs were perfectly gapped and added smooth power!

      Michael

      Year: 2012 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      March 22, 2017

      Easy but careful

      VERY IMPORTANT WHEN INSTALLING REMOVE THE BATTERY FIRST!!! Almost killed my self installing the passenger side last spark plug. Yes I know a very noobie mistake. And other than that very very easy to install and smoother idle than stock by far

      comptonguy

      Year: 2011 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      August 30, 2014

      Quality Product

      This is my first time ever installing my own spark plugs, so installation took a couple hours. Could probably get it done in about little over an hour if experienced. Can't really compare to others, or make any note on the performance gain since I don't have a dyno. I can say though that as a driver I noticed the car ran a lot smoother. Overall, I'm very happy with this product.

      ElectroTurk

      Year: 2011 Submodel: GT Ottawa, ON, Canada

      Helpful (2)

    • 4/5

      Installation Time: Afternoon

      January 24, 2014

      Great Replacement

      Took just about 3 hrs to install these. Smoother idle and perfect fit.

      Carolina

      Year: 2012 Submodel: GT Phoenix, AZ, USA

      Helpful (2)

    • 4/5

      Installation Time: Afternoon

      January 24, 2014

      NKG Plugs

      They are OK, did not see alot of difference. For the money, Ford plugs are just as good.

      ham711

      Year: 2014 Submodel: GT Grand Prairie, TX, USA

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      August 21, 2013

      2012 GT

      Easy install. Less than an hour. NGK always makes a great product! Smoother idle.

      MachRMan

      Year: 2012 Submodel: GT Fort Lauderdale, FL, USA

      Helpful (2)

    • 5/5

      December 25, 2017

      Dee

      Very intelligent purchase for my 2015 GT, car running smoother and stronger!

      DaraylT

      Year: 2015 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      November 13, 2017

      great

      def feel more power over the whole power band and better fuel consumption.

      JasonL

      Year: 2013 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      November 08, 2017

      Exactly what I expected!

      pretty easy install if you know your way around your motor. Changed them and got the little bit of umph that I had lost almost at 60000 miles. Great plugs. I’ve used them for years! Use some anti seize on the threads!

      Taran

      Year: 2014 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      September 15, 2017

      No more misfires

      The plugs are great! Car runs beautifully. No more codes

      MCC

      Year: 2013 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      June 16, 2017

      Spark

      These plugs seem to perform a little better than the stock plug.

      KeithR

      Year: 2015 Submodel: GT

      Helpful (1)

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