HT0 Spark Plug (05-08 GT)

38 Reviews 6 Answers

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$89.99 (set)

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Features, Video & 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

Product Resources

Customer Photo (1) Customer Reviews (38) Questions (8) & Answers (6)

Review & Installation Video

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

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

What's in the Box

(8) Spark Plugs

Installation Info

Installation Time

(approx) 2 Hours

Difficulty Level:

Light to Moderate mechanical skill required.

Installation Guides

Manufacturer:
How to Install Autolite HT0 Spark Plugs on Your 2005-2008 Mustang GT

Customer Submitted:
How to install Ford Motorcraft OEM Spark Plugs on your 2008-2010 GT Mustang

Tech Specs

Tech Guides:

All About Mustang Spark Plugs and Ignition Components

Will it fit my Mustang?

Bullitt - 08
GT - 05, 06, 07, 08

Intended for use with nitrous, turbo, or supercharged applications

Questions & Answers (8)

5 Top Rated Questions

I have longtubes, cai, tune, can i daily these an have no problems

Which plugs should I use with MSD blaster coil packs?

When upgrading spark plugs, we generally recommend checking with your tuner.

Helpful (0)

will these work with aftermarket cam (stage 2) a tune and headers?

Will these plugs work well with my 06 gt stock everything?

Hello! 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. They would not be a good option or necessarily even work on a stock GT.

Helpful (0)

i see that these plugs are good for nos. but i daily drive my mustang and drag it every now and then so i would like to know if these plugs are good for when i daily my mustang and do not use my nos!

Hi, These plugs are 1 degree colder than your stock plugs and can still be used for your daily driver and on the track.

Helpful (0)

Not finding an answer? Ask your question! Post Your Question

3 More Questions

Are these 2 piece like OEM for the 3V head or are they one piece plugs? 1 answer

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

Helpful (0)

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. 1 answer

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.

Helpful (0)

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? 1 answer

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.

Helpful (0)

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Customer Reviews (38) Write a Review

Overall Rating

4.8

out of 5 stars

Installation Time:Less than 1 Hour

Installation Cost:0-$100

Performance Gain 4.4 4.4
Fit 4.966667 5.0

no one in the world ever gets what they want, and that is beautiful

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5/5

Installation Time: Less than 1 Hour

April 06, 2019

Starts

Got them all off and on within two hours I think, starts every time, I have to change the coils to ensure great start, then the fuel injectors, then the wiring harnesses that connects each terminal to terminal, and then , there’s much to to

LoveMyGT

Year: 2007 Submodel: GT

Helpful (0) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Less than 1 Hour

April 02, 2019

HTO Spark Plugs

These are recommend for my supercharged Roush Mustang and have had used them previously and they performed excellent. I'm currently upgrading my coil packs so I am replacing with again the HTO spark plugs so everything is new for my ignition systems.

EdwardG

Year: 2005 Submodel: GT

Helpful (0) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Less than 1 Hour

February 13, 2019

Aksel

Great plugs, the original HT0 had 50,000 miles on them, still good but decided to change them since I was working on the car. Forced induction (supercharger), gapped the plugs at .030.... Soaked down the old plugs with Nut Buster for 24 hours prior to removing and none broke off...

GARRYH

Year: 2006 Submodel: GT

Helpful (2) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Less than 1 Hour

December 28, 2018

Great choice

Perfect fitment. Running 100 better now! Very satisfied with these plugs.

SBarros92

Year: 2006 Submodel: GT

Helpful (4) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Less than 1 Hour

December 19, 2018

HTO plugs

I received the spark plugs quickly and they were exactly as descibed

DanL

Year: 2006 Submodel: GT

Helpful (4) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Less than 1 Hour

November 29, 2018

Great product

Car was puttering all over the place with old stock plugs , put these bad boys in and she runs like a brand new car . Also feel a little more throttle .

JamarisS

Year: 2006 Submodel: GT

Helpful (4) Thanks for your input!
- Performance Gain 4
  4
- Fit 5
  5
5/5

Installation Time: Afternoon

August 26, 2018

Worked great, eliminated detonation!

Replaced factory plugs with these, had minor detonation even w/93 octane ... all stock. Replaced plugs, runs great, cut detonation down to almost nothing. Perfect! PB Blast the old plugs for a few hours, the get a good fitting 9/16 socket on cold motor, by hand, go slow ... no broken plugs.

07GTAF

Year: 2007 Submodel: GT

Helpful (6) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Shop Install

Installation Cost: 0-$100

June 27, 2018

Edelbrock Stage 1 Mod Package

My mechanic said to buy these. I did and my 2008 Bullitt runs better than ever. Great fun to drive.

Albert

Year: 2008 Submodel: Bullitt

Helpful (6) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Afternoon

June 15, 2018

Autolite HTO Spark Plugs

The same plug that was used in my car when i had the stage 3 Saleen up grade done from Brenspeed. Perfect plug for supercharged vehichles

Tracy

Year: 2008 Submodel: GT

Helpful (6) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Less than 1 Hour

June 07, 2018

Great

Went to local store for same plugs, about 3-4$ more per plug as well as being out of state. Got these guys great price and a day early. Easy install as well. So far they are performing great with the turbo.

blackstang

Year: 2007 Submodel: GT

Helpful (7) Thanks for your input!
- Performance Gain 3
  3
- Fit 5
  5
5/5

Installation Time: Afternoon

May 06, 2018

Great spark plug

Was able to get all the old ones out without breaking any.

DeanW

Year: 2006 Submodel: GT

Helpful (7) Thanks for your input!
- Performance Gain 4
  4
- Fit 5
  5
5/5

Installation Time: Less than 1 Hour

April 22, 2018

Great spark plugs

They do as advertised and arrived 1 day before they were scheduled!

Drewpeacock

Year: 2006 Submodel: GT

Helpful (8) Thanks for your input!
- Performance Gain 3
  3
- Fit 5
  5
5/5
April 08, 2018

Big difference!!!!

These Autolite HTO spark plugs really made my 2008 gt come alive!!. Before I changed the plugs I couldn't get no boost out of supercharger but now it is a Beast again!!

stangman

Year: 2008 Submodel: GT

Helpful (7) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Less than 1 Hour

April 02, 2018

great spark

works very good with or with out nitrous would iv all ways used Autolite plugs even in my Dodge

DannyBarnes

Year: 2006 Submodel: GT

Helpful (7) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Less than 1 Hour

February 13, 2018

They Work Well

These plugs were affordable. working well in my 06 mustang GT that I added a Roushcharger. its been a year and 10k miles with no misfires nor issues. You do not gain any power from a sparkplug change and never change your plugs before 100k miles. factory plugs are platinum.

bipolarenigma

Year: 2006 Submodel: GT

Helpful (17) Thanks for your input!
- Performance Gain 3
  3
- Fit 5
  5
5/5

Installation Time: Less than 1 Hour

February 13, 2018

Great replacement for oem.

Easy to replace. Just soak the old spark plugs with PB Blaster overnight and they come out easily.

SOP

Year: 2005 Submodel: GT

Helpful (9) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Afternoon

July 28, 2017

Excellent

Shipping was quick and they installed in a breeze. Mustang is running nice and smooth now!

TrevorA

Year: 2006 Submodel: GT

Helpful (9) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Less than 1 Hour

June 16, 2017

Good Plugs

Pain getting the old ones out. But the new plugs work great with my supercharger! Noticed a difference.

SethW

Year: 2007 Submodel: GT

Helpful (9) Thanks for your input!
- Performance Gain 5
  5
- Fit 5
  5
5/5

Installation Time: Less than 1 Hour

June 15, 2017

Good Sparks

Good Sparks! An easy upgrade over the stock Sparks, with a noticeable kick.

theone44

Year: 2006 Submodel: GT

Helpful (8) Thanks for your input!
- Performance Gain 4
  4
- Fit 5
  5
5/5

Installation Time: Afternoon

June 14, 2017

great plugs

These plugs worked well for me on my 06 mustang. I've read they are much better on a forced induction application so I will be trying a hotter plug next time around. Still worked great over my 100k mile stock plugs.

DerekC

Year: 2006 Submodel: GT

Helpful (8) Thanks for your input!
- Performance Gain 4
  4
- Fit 5
  5

HT0 Spark Plug (05-08 GT)

Buy Together

$89.99

+$16.79

+$264.95

+$189.99