Free Shipping On Orders Over $49. Details

Talk to a Mustang Expert
1-877-887-1105
Mon - Sun, 8:30 AM EST - 11:00 PM EST
Win 1 of 2 $15,000 Mustang Builds! Enter To Win!

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

Market Price $139.99 You Save 14% ($20.00)
Starting At

$119.99 (set of 8)

FREE Shipping
  • Item 64062
  • MPN#91725

    more

Local Install Shops

Quoted installation from $125

View 3 Shops

near 19355 (change)

Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
Ship to: ASHBURN - 20146
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    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?

    You Might Also Like

    Customer Photos

    More Products You Might Like

    15 Questions / 6 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 (2)

    I have a 13 Mustang GT. If I buy new 65,000 volt coil packs, would it be a good idea to get new plugs? If so, are these good ones? Would you recommend another type. If it matters, the car already has CAI, long tubes, cat delete X pipe, resonator delete over axels, and running the Bama 93 octane race tune.

    PandaRacing

    • 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.

      AMJEFF

    Helpful (1)

    Can you install these spark plugs on a stock 2014 mustang GT?

    LuisG

    • The NGK Laser Iridium Performance Spark Plugs would be directly compatible with your stock 2014 Mustang GT!

      AMMikeS

    Helpful (0)

    Are these plugs good for a full bolt on mustang gt running on e85?

    BrettW86

    • 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.

      Rob D

    Helpful (0)

    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)

    People Who Bought This Item Also Bought

    Customer Reviews (36) Write a Review

    Overall Rating 4.8

    out of 5 stars

    Installation Time:Afternoon

    Installation Cost:0-$100

    • Performance Gain 3.828571 3.8
    • Fit 4.944445 4.9



    • 5/5

      Installation Time: Less than 1 Hour

      May 19, 2018

      An important piece of the puzzle

      NGK plugs in combination with new Granatelli ingition coils seemed to add a slight increase in power. As part of any setup good plugs will help you squeeze out every last drop of horsepower.

      ChrisM

      Year: 2015 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Afternoon

      April 26, 2018

      14 gt

      Very easy to install and a great spark plug. I won't use anything but NGK

      LochlinA

      Year: 2014 Submodel: GT

      Helpful (1)

    • 4/5

      Installation Time: Less than 1 Hour

      April 17, 2018

      Same as factory

      Easy to install not like the s197 plugs these are normal just let car get to 80 to 100 degrees and change them.

      Blake

      Year: 2015 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      April 10, 2018

      Better Performance!!!

      These plugs were recommended by my tuner for my 2014 Mustang GT. I immediately noticed a difference in performance at the track and ended up running my best time. Definitely worth the money.

      SinisterStang

      Year: 2014 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      March 30, 2018

      Quick and Easy

      Installing the plugs is pretty straight forward. Be mindful that the clips are almost impossible to get off the coils. but the replacement process is easy and can give you back a few HP you may have lost from old worn out plugs.

      Pittmadj

      Year: 2014 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      March 30, 2018

      great spark plug

      easy to install and much better idle, throttle response and fuel burn. so far so good

      Darkhorse

      Year: 2014 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      March 28, 2018

      Works

      I installed the GT350 intake manifold and added the plugs. They work really well together.

      KenL

      Year: 2017 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      March 24, 2018

      NGK Laser iridium

      these plugs made a noticeable difference on my 2011 gt. with 58,000 mi. much stronger top end. smoother idle. took my time, clean and gap as you go.

      nitro

      Year: 2011 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      February 19, 2018

      Great plugs

      These plugs help me make 472 wheel hp on 93 octane. With a GT350 intake manifold.

      AlexanderA

      Year: 2016 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      February 08, 2018

      NGK

      Great plugs good replacement for the stock. Better idle abd just runs great!!!

      Coyote

      Year: 2013 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      February 01, 2018

      Love these plugs

      This is my 2nd set of these plugs. I felt the improvement in power and fuel economy through out the life of the last set of plugs. I was very happy with what I was observing and recording in my fuel log. So I purchased a new set when the time arrived. These are great plugs and I would recommend them to anyone looking to replace their plugs.

      mgmeakes

      Year: 2014 Submodel: GT

      Helpful (1)

    • 5/5

      December 25, 2017

      Dee

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

      DaraylT

      Year: 2015 Submodel: GT

      Helpful (3)

    • 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 (2)

    • 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 (2)

    • 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 (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 (3)

    • 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 (3)

    • 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

      June 18, 2017

      tune up for dyno day

      Plugs were perfectly gapped and added smooth power!

      Michael

      Year: 2012 Submodel: GT

      Helpful (3)

    • 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 (2)

    Related Mustang Categories