This is topic gt40 heads ques... in forum Tech Talk at Northern California Ford Owners  .


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Posted by two-gun kid (Member # 5891) on :
 
what are the differences between the gt40,gt40p and gt40x? i know the gt40 heads were stock for 5.0 cobras,the gt40p from explorer and the gt40x are aluminum? what are the other differences?
 
Posted by ShiftyGT (Member # 3862) on :
 
The GT40P flows more than the GT40 but you have to have a specific type of header. The GT40X flows even more... you can look up the #'s of fordmotorsports.com
 
Posted by 92stangLX (Member # 3252) on :
 
Check out this site. It covers the GT40 vs. GT40p question.

http://www.themustang-net.com/tech_articles/gt40p.shtml
 
Posted by two-gun kid (Member # 5891) on :
 
what headers do i have to use if i get gt40p's? would bbk shorties work?
 
Posted by two-gun kid (Member # 5891) on :
 
are there only certain hearders that will work?
does any obdy know that one website that you can compare all the heads on the market.withe the flow charts

[ August 05, 2005, 02:59 PM: Message edited by: two-gun kid ]
 
Posted by HungryHippo (Member # 537) on :
 
www.fordmuscle.com has flow charts for all of those. you need specific headers for the gt40p heads, i think mac and fms make them. i've also heard of mac longtubes working
 
Posted by jordan_0806 (Member # 5888) on :
 
mac and fms...are the only co. that make headers for the gt-40p's....bbk's will not work...
 
Posted by h8louzn (Member # 1075) on :
 
Why will the bbk's or others not work?
I have seen bbk's on gt 40P's and they were working fine.
He had to use a wrench to get 2 of the plugs out but alot less money than buying a new pair of headers!
 
Posted by two-gun kid (Member # 5891) on :
 
yes ive also heard of people using bbk shorties with gt40p's, is there a difference in exhuast port that doesnt match up with other headers.
 
Posted by h8louzn (Member # 1075) on :
 
It's just that the spark plugs are in a different location so the header tube is over some of the plugs.
My friend used some 90 degree boots on his plug wires and it worked OK.
 
Posted by two-gun kid (Member # 5891) on :
 
woulnd the boot hit the header? can you get a picture of you friends heads and headers? which tubes covers the park plug holes?
 
Posted by h8louzn (Member # 1075) on :
 
I can't get a picture as he sold the car.
I'm not sure which ones are over the tube.
Sorry
 
Posted by HaulinAssMaro (Member # 541) on :
 
quote:
Originally posted by jordan_0806:
mac and fms...are the only co. that make headers for the gt-40p's....bbk's will not work...
I used BBK Shorty Headers with my P heads with no issues.Now I have Mac longtubes.Very minimul issues with sparkplug removal,but ground down a spark plug socket and all issues went away.....
 
Posted by two-gun kid (Member # 5891) on :
 
so i will be able to use my bbk shorties with the gt40p's?
 




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