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Autolite HT0 Spark Plug (05-08 GT)

Market Price $99.99 You Save 10% ($10.00)

$89.99 (set)

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  • Item 64201
  • MPN#HT0

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Features & Details

  • Perfect for Nitrous and Force Inducted Engines
  • Colder Heat Range
  • Copper Core with Platinum Tip
  • Fits 2005-2008 GT's w/ Black Coil Boots
  • Sold as a Set of 8
More Power. When you add nitrous, superchargers, or turbos to your Pony you need the correct spark plug to maximize the horsepower benefits available from these modifications. That is where Autolite "HT0" Spark Plugs come into play, these plugs are specifically designed for applications that require one step colder heat range.

Superior Materials. Autolite Spark Plugs have a thin profile design with a copper core for its superior conductivity and a durable platinum tip to assure a strong spark and a long life to keep your performance Pony running at it's peak power.

Application. This set of eight (8) Autolite HT0 Spark Plugs are specifically designed as an upgrade for nitrous or force inducted 2005 to 2008 GT Mustangs. These plugs are factory gaped at 0.045 inch.

Fitment: 2005 2006 2007 2008 Details

What's in the Box
  • (8) Spark Plugs
Installation Info
Will it fit my Mustang?
  • Bullitt - 08
  • GT - 05, 06, 07, 08

Intended for use with nitrous, turbo, or supercharged applications

Most Helpful Reviews

5/5
Second set for my '05 Saleen SC

Waited a little long to replace mine in my '05 (~50,000mi), but the first set came out just fine after being soaked with some carb cleaner for a bit. I would definitely recommend these for great performance ...

Read More
Helpful (1)

5/5
great plugs

I have not used these before. I have a o6 Roush and this was what was it. Seems to make it just a little stronger.

Helpful (1)

Overall Rating 4.6 out of 5 stars
Read All 17 Reviews

Customer Photos

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3 Questions / 3 Answers

Ask a Question

Can i use these spark plugs even though i cant get supercharge yet? Im due for some new sparkplugs, 82,xxx miles. What plugs do u recommend?

Stephen123456

  • These plugs are a different heat range than the stock plugs and for a naturally aspirated engine (no boost), you should get the Autolite HT1s.

    13726548

    Good Answer (0) (0)

Answer This Question I need this answered (0) (0)

Are these 2 piece like OEM for the 3V head or are they one piece plugs?

Squad27

  • The Autolite HT0 Spark Plug (05-08 GT) are one piece spark plugs.

    AshleyK

    Good Answer (0) (0)

Question Resolved

Use without NOS or an S/C? I have a few upgrades but I'm not running NOS or a S/C and I would like to put some better plugs in other then the 2 piece OEM plugs will these work fine in my stang or give me more headache then performance? Thanks for the help.

Jman21

  • The Autolite HT0 Spark Plug (05-08 GT) would do more harm than good if you didn't have the proper power (i.e. a boosted application of some sort) in order to support it.

    JeffAM

    Good Answer (0) (0)

Answer This Question I need this answered (0) (0)

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Customer Reviews (17) Write a Review

Overall Rating 4.6

out of 5 stars

Installation Time:Less than 1 Hour

  • Performance Gain 4.222222 4.2
  • Fit 4.888889 4.9



  • 5/5

    October 06, 2016

    hto plugs

    appear to be great plugs, can notice a slight improvement in performance. they are supposed to be 1 piece body so they wont separate like originals.

    mabuck

    Year: 2006 Submodel: GT

    Helpful (1) (0)

  • 5/5

    August 25, 2016

    great plugs

    I have not used these before. I have a o6 Roush and this was what was it. Seems to make it just a little stronger.

    John1

    Year: 2006 Submodel: Other

    Helpful (1) (0)

  • 5/5

    August 08, 2016

    Spark Plugs for mustangs !

    These plugs made my car real snappy! I do recommend replacing the coils to if your thinking of more power especially if you have a super charger in the way LOL !

    Yonald

    Year: 2007 Submodel: Other

    Helpful (1) (0)

  • 5/5

    August 04, 2016

    They work beats!

    They work beast on my06 gt never go wrong with them haven't tried then on the bottle but more than sure it's gonna work beast.

    Gordoo

    Year: 2006 Submodel: GT

    Helpful (1) (0)

  • 5/5

    July 17, 2016

    Second set for my '05 Saleen SC

    Waited a little long to replace mine in my '05 (~50,000mi), but the first set came out just fine after being soaked with some carb cleaner for a bit. I would definitely recommend these for great performance on a tuned SC application.

    2005S281SC

    Year: 2005 Submodel: Other

    Helpful (1) (0)

  • 5/5

    July 27, 2011

    HTO spark plugs

    These are my 4th set. Very satisfied. Just make sure to use anti seize and these are a piece of cake to intstall. Use them with a 100shot of nitrous and have never had a problem. Reset them at 035 for the nitrous. Great product.

    Ron Hayden

    Year: 2006 Submodel: GT

    Helpful (5) (1)

  • 5/5

    Installation Time: Less than 1 Hour

    April 27, 2012

    Very good product

    very nice plugs and very nice experience with american muscle .I'll recomended it.

    bola

    Year: 2005 Submodel: GT Venezuela

    Helpful (2) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    December 08, 2011

    Autolite Plugs

    The plugs are great replacements and highly recommended for stock or mod engines. I used this brand to stay as close to stock replacement as I could for performance. I installed a Nitrous kit so I had to gap plugs for a colder burn. Make sure you have the special gapping tool and a set of mini feeler gauges before you do the swap out if you are doing for NOS,Turbo or Super Charger.I will use these plugs again next time I need to change out.

    05TXGTSTANG

    Year: 2005 Submodel: GT Springtown,TX

    Helpful (3) (1)

  • 5/5

    Installation Time: Afternoon

    May 02, 2012

    Perfect for turbo

    These compliment any supercharger, turbo, or nitrous and are a needed component when installing one.

    Rangerj84

    Year: 2007 Submodel: GT fort benning, ga

    Helpful (1) (0)

  • 4/5

    Installation Time: Less than 1 Hour

    April 27, 2012

    Good Product

    Very cool plugs for power on N/A Mustang. Gives it a little more then the HT1 plugs. Fast Service from AM and will definitely buy from them again.

    GtKid

    Year: 2008 Submodel: GT Worton MD.

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    March 23, 2012

    Works as advertised

    Installed Saleen SC along with these plugs. Removed and installed as per Ford tech bulletin. Car pulls like crazy. No ping or detonation just power!!!!!!!!

    bkmech43

    Year: 2006 Submodel: GT Camp Hill Pa

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    March 23, 2012

    outstanding spark plugs

    My ford motorcraft spark plugs have some mile on them. after replacing them my fuel milage went back up and gain a little more horse power. If you look for something to help with the gas milage and give you more horse power this is the way to go. I would recommend that if you have 50,000 or more mile you should think about changing them.

    ayers19792001

    Year: 2006 Submodel: GT germany

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    January 12, 2012

    Better perfomance

    Just had thees installed as I was getting a misfire prior. Now the car runs smooth and no misfire. I also have noticed a slight increase in gas mileage.

    extreme06

    Year: 2006 Submodel: Other

    Helpful (2) (1)

  • 1/5

    Installation Time: Less than 1 Hour

    October 04, 2011

    STAY AWAY!

    I got these plugs even though I had heard about the coating flaking off and boy was I sorry I bought them. I was going to take my car out to my local drag strip over the weekend but on Friday my car started spittin like crazy and I got it to throw a code so I could check it with my programmer. It turns out that I was having missfires in three of my cylinders after only having the plugs for a week. I will never buy these again and I will warn everyone I know to stay away from them.

    jdawggt

    Year: 2007 Submodel: GT

    Helpful (4) (4)

  • 5/5

    Installation Time: Less than 1 Hour

    November 06, 2013

    Perfect Fit

    I needed a set of replacement plugs, these seemed to be the best to bring my spark back. They fit perfectly and had no issues. It seemed to run a little clearer with new plugs too.

    Brian

    Year: 1997 Submodel: GT Green Lane, PA

    Helpful (0) (1)

  • 5/5

    September 12, 2016

    Very good to run with a 150 nitrous shot

    I bought them to run with a 150shot them do the job pretty well ,thx to americanmuscle they arrive to my home pretty fast

    Jose

    Year: 2005 Submodel: GT

    Helpful (0) (0)

  • 4/5

    July 20, 2016

    Nice plugs

    I like these plugs but be aware... mine came gapped anywhere between.033 to .040 so I had to re-gap them. Check the gap before you install them.

    GTV6

    Year: 2007 Submodel: GT

    Helpful (0) (0)

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