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

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

$119.99 (set of 8)

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  • Item 64062
  • MPN#3789

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Features & 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
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
Will it fit my Mustang?
  • Boss 302 - 12, 13
  • GT - 11, 12, 13, 14, 15, 16, 17

Most Helpful Reviews

5/5
2012 GT

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

Helpful (1)

5/5
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 ...

Read More
Helpful (1)

Overall Rating 4.5 out of 5 stars
Read All 11 Reviews

Customer Photos

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2 Questions / 4 Answers

Ask a Question

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

    Good Answer (1) (0)

Question Resolved

do these come pre-gapped? and what is the gap for a '11 5.0 stock

luzstang

  • These plug do come pre gapped, should be gapped for .054. I'd recommend checking the gap on all the plugs prior to install.

    MachRMan

    Good Answer (2) (0)

Show 2 more answers Question Resolved

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Customer Reviews (11) Write a Review

Overall Rating 4.5

out of 5 stars

Installation Time:Afternoon

  • Performance Gain 3.3 3.3
  • Fit 4.818182 4.8



  • 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 (1) (0)

  • 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 (1) (0)

  • 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 (1) (0)

  • 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 (1) (0)

  • 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 (2) (1)

  • 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 (1) (0)

  • 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 (1) (0)

  • 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 (1) (1)

  • 5/5

    Installation Time: Afternoon

    March 01, 2014

    Good Quality

    Didn't fix my problem but seems like a good product. No performance gain that I can tell.

    AWA96

    Year: 2011 Submodel: GT Rock Hill, SC, USA

    Helpful (0) (1)

  • 3/5

    Installation Time: Less than 1 Hour

    August 07, 2012

    as expected

    My factory plugs had become coated in a residue from using octane boost too frequently. Swapped them out for these and as expected it cleaned the feeling up. Plugs for these cars are not cheap, but like with everything else you get what you pay for.

    drew302

    Year: 2012 Submodel: GT rancho cucamonga ca

    Helpful (0) (2)

  • 5/5

    Installation Time: Less than 1 Hour

    January 01, 2016

    A nice buy

    I bought these plugs and just like some other reviews said I got a smoother idle. That was the most notable difference. I also noticed better response. My car need plugs and I went we these and picked up a little something too. Remember they are just plugs.

    Marcos1961

    Year: 2011 Submodel: GT Gilroy, Ca.

    Helpful (0) (1)

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