GT40 Heads

[Mustangmaster77]

I was wondering if there was any difference between GT40P's and GT40X's (other than the cars they come out of)?

 

[stang94X]

well gt40X heads never came on a car, they are aftermarket aluminum heads, gt40s are the cast irons off a cobra, between the gt40 and gt40p, i believe they are the same heads but the p's have a different plug angle, some people have told me that the p-heads flow better but i dont how true that is, as for the gt40X heads they are aluminum with bigger valves, better springs and bigger ports

 

[Mustangmaster77]

Oh ok cause the local junk yard only wants $60 bucks for them and I was gonna pull them off an explorer clean them up and throw them on, do you have an idea as to how much of a difference they will make, I was guessing maybe like 10-15?

 

[stang94X]

you'll get more than that, but an intake with it would be a good deal of improvement, if you have the money then get the heads ported and get bigger valves installed, that'll make a big improvement, but because the plug angles are different on the p-heads, you have to get a different set of headers

 

[Mustangmaster77]

alright thanks for the help man

 

[Win]

sh*t for 60 bucks take them off and turn around and sell them if you dont want them. do they have v8 explorers there ???

Where are you located ???

 

[LAFENATU]

The difference in the gt40 vs p is plug angle and valve size. The p's flow slightly better but the difference is negligable.

Fyi...some of the explorers did come with the gt40 head too..

Look on the casting on the end of the head.

Gt = gt40

Gtp = gt40p

 

[stang94X]

Fyi...some of the explorers did come with the gt40 head too..

it was the late 90's explorers that had the gt40p heads right?

 

[LAFENATU]

Fyi...some of the explorers did come with the gt40 head too..

it was the late 90's explorers that had the gt40p heads right?

Late 90's and I believe part of year 2000.

 

[Mustangmaster77]

sh*t for 60 bucks take them off and turn around and sell them if you dont want them. do they have v8 explorers there ???

Where are you located ???

I know right people are paying close to if not $300 for them, I checked their web site and the had at least 20 explorers maybe half were V8's, and I'm in St.Cloud FL

 

[95gtdrop]

what are those heads capable of power wise?

 

[Win]

what are those heads capable of power wise?

If you have them with a cobra upper and lower i think you would probably see about 250 to the wheels.

 

[LAFENATU]

what are those heads capable of power wise?

In stock form they are worth a good solid 25-30hp over e7's.

When ported and ported right...they can go a long way.

Ever see any of the nmra factory stock cars? They can only use e7's, gt40, or gt40p heads.

 

[jds5.0]

Fyi...some of the explorers did come with the gt40 head too..

it was the late 90's explorers that had the gt40p heads right?

96-early 97 = GT-40 (stamped "GT")
late 97-2001 = GT-40P (stamped "GTP")

 

[LAFENATU]

Fyi...some of the explorers did come with the gt40 head too..

it was the late 90's explorers that had the gt40p heads right?

96-early 97 = GT-40 (stamped "GT")
late 97-2001 = GT-40P (stamped "GTP")

There ya go..

I was unsure of when it was...thanks JD..