dv3

do the gt40 heads from a 94 cobra have the same specs as gt40 heads from an explorer?
is $200 kinda expensive for the 94 cobra heads?

LIL D

the gt40 are iron and have 1.85/1.54 valves i thinkand the gt40ps are aluminum and have different valve sizes i know exhaust is a 1.46 or what ever factory size is on e7 heads and usually gt40 heads go for around 300

LTnone

Same heads.

Edit: now that I think about it, I'm not sure if the combustion chamber is the same size or not. At least on the '93 Cobras, the chamber was 64cc, as opposed to 65-6cc on the Exploders. You can get the same effect with Exploder heads by milling them down a bit.

tmajikman

I think the combustion chamber on the cobra heads are smaller, the cobra heads are better from what I here, as long as they are not cracked or anything. 200 bones sounds good for cobra heads.

TTGreenSN95

Both heads are cast iron but they are different indeed I just put a set of gt40p's on my stang Ill let you know how they do if i ever get it started lol I know the gt40p need a different header and they do not have smog holes in the back. i got my gt40p's from ebay for 299.00. good luck

dv3

94 cobra would be gt 40...not gt 40p ....correct?

my77stang

just to clarify.... intakes are 1.84 on the 40 and the 40P and ex is 1.54 on the 40 and 1.46 on the 40P

tmajikman

correct

frdmstng1986GT

you are right.. just a little more fact on it that even though the P's have smaller exhaust valves they actually flow better on the exhaust side then the regular 40's do.

Joel5.0

'94-'95 Cobra GT40 heads (F4ZE) = 60-63cc chamber, 1.84"/1.54" valves
'96-'97½ Explorer GT40 heads (F1ZE) = 63-66cc chamber, 1.84"/1.54" valves
'97½ -'01 Explorer GT40p heads (F77E) = 58-61cc chamber, 1.84"/1.46" valves