My spark plugs dont fit the GT40 heads

BaBiLuTH · Dec 9, 2005

Hey, I am about to install gt40 heads on my 88 GT and have a small problem. I tried to swap the spark plugs from the old head to the GT40s and the plugs dont fit. Does anyone know what year and/or model mustang plugs I should use for this. Im I dont need anything fancy for the plugs, just something to get me going for now. Thank you.

Look Its Aaron · Dec 9, 2005

What gt40's are they. The reguar gt40 irons? gt40p's gt40 y's?

dragnazz5.0 · Dec 9, 2005

autolite 3924's i think are the correct one. go to the parts store and ask for plugs for a 98 explorer with a 5.0 and they should be the same ones.

Grn92LX · Dec 9, 2005

I beleive gt40 iron's take an autolite 764. They do not use stock plugs from an E7 head.

BaBiLuTH · Dec 9, 2005

I have regular Iron GT40s

Mustang5L5 · Dec 9, 2005

Autolite 764's.

EVery GT-40 version uses that plug. It's the same plug as the 4.6L Mustang as well

BaBiLuTH · Dec 9, 2005

So the autolites are for what car? What do I ask for when going to the parts store??

Mustang5L5 · Dec 9, 2005

1993 Mustang Cobra

Euphoric306 · Dec 10, 2005

id love to go into a parts store and ask for any part to that car hehe

i kinda have a moment of pride when they ask me the 4 cyl or 302 and i say its the 5.0

one time she automatically went to 4cyl so i picked up the monitor and smashed it over her head

haha jk, but yea, good luck with teh plugs

v8only · Dec 10, 2005

the 764 is the same plug for the explorers. Don't even look it up on their monitor, just tell them to grab you 4-764 plugs.....jk 8 -764 plugs

Desperado · Dec 11, 2005

ask for the plugs for a 93 or 94 mustang cobra. motorcraft plug should be the asf32 i believe. but i ask for 94 cobra plugs when i go in and that it what i get and they work great

dragnazz5.0 · Dec 11, 2005

yep, you guys are right....the 3924s are plugs for aluminum heads

Jarhead67 · Sep 6, 2022

BaBiLuTH said:
Hey, I am about to install gt40 heads on my 88 GT and have a small problem. I tried to swap the spark plugs from the old head to the GT40s and the plugs dont fit. Does anyone know what year and/or model mustang plugs I should use for this. Im I dont need anything fancy for the plugs, just something to get me going for now. Thank you.

1996 explorer plugs

Jarhead67 · Sep 6, 2022

Jarhead67 said:
1996 explorer plugs

I use motorcraft copper plugs SP447A

02 281 GT · Sep 6, 2022

Phew. After seventeen years, he can finally get his heads installed.

7991LXnSHO · Sep 8, 2022

Related to this zombie thread are the plugs I just got for my E-7 heads. I ordered AC Delco Copper core plugs, and I expected them to be reboxed Denso plugs. Nope.

They are made in China, with a black oxidized finish. They look well enough made, but I’m definetly using anti seize and checking gaps.
I’m not sure where to get new plugs made in the US or Japan anymore.

Adieu · Sep 8, 2022

7991LXnSHO said:
Related to this zombie thread are the plugs I just got for my E-7 heads. I ordered AC Delco Copper core plugs, and I expected them to be reboxed Denso plugs. Nope.

They are made in China, with a black oxidized finish. They look well enough made, but I’m definetly using anti seize and checking gaps.
I’m not sure where to get new plugs made in the US or Japan anymore.

NGK makes their plugs in Japan still. I run them in ESP and the 4Runner exclusively.

Delco and Motorcraft are relabeled Autolites, which are made by Honeywell, hence the Chinese manufacturing.

02 281 GT · Sep 8, 2022

I see a lot of NGK branded plugs on Amazon with bad reviews saying they received knockoffs. I might be tempted to say that I would only buy them at the dealership at this point. Knockoff parts are a serious problem these days.

Adieu · Sep 9, 2022

02 281 GT said:
I see a lot of NGK branded plugs on Amazon with bad reviews saying they received knockoffs. I might be tempted to say that I would only buy them at the dealership at this point. Knockoff parts are a serious problem these days.

I get mine from the local parts store or Rock Auto to avoid that.

Mustang5L5 · Sep 9, 2022

Amazon has a ton of fake automotive parts these days. Lots of fake motorcraft and AC delco stuff as well as other brands

My spark plugs dont fit the GT40 heads

BaBiLuTH

New Member

Look Its Aaron

Your car looks like it came straight from Mexico.

dragnazz5.0

My "0" key d0esn't w0rk, s0 I have t0 use the zer0

Grn92LX

Fidanza Man!

BaBiLuTH

New Member

Mustang5L5

That is…until I whipped out my Bissell

BaBiLuTH

New Member

Mustang5L5

That is…until I whipped out my Bissell

Euphoric306

New Member

v8only

Active Member

Desperado

New Member

dragnazz5.0

My "0" key d0esn't w0rk, s0 I have t0 use the zer0

Jarhead67

Jarhead67

02 281 GT

Agreed...My wife has great Boobs

7991LXnSHO

wanna catch the space herp

Adieu

Easy there, this ain't a dating site.

02 281 GT

Agreed...My wife has great Boobs

Adieu

Easy there, this ain't a dating site.

Mustang5L5

That is…until I whipped out my Bissell

Similar threads

My spark plugs dont fit the GT40 heads

New Member

Your car looks like it came straight from Mexico.

My "0" key d0esn't w0rk, s0 I have t0 use the zer0

Fidanza Man!

New Member

That is…until I whipped out my Bissell

New Member

That is…until I whipped out my Bissell

New Member

Active Member

New Member

My "0" key d0esn't w0rk, s0 I have t0 use the zer0

Agreed...My wife has great Boobs

wanna catch the space herp

Easy there, this ain't a dating site.

Agreed...My wife has great Boobs

Easy there, this ain't a dating site.

That is…until I whipped out my Bissell

Similar threads

Privacy & Transparency

Privacy & Transparency