Results 1 to 12 of 12

Thread: Mustang headers

  1. #1
    Join Date
    Sep 2004
    Location
    Herrin Illinois
    Posts
    3,437

    Mustang headers

    I found a really good deal on a pair of mustange headers for a 3.8, Will they work?

  2. #2
    Join Date
    May 2003
    Location
    York, PA
    Posts
    523
    Yes, but the collectors are bigger and go down at a different angle so you will not only have to make um "custom" downtubes, you may also have to cut the one side of the bracket on the drivers side as it goes closer to the steering column. I should know I have them on mine lol

  3. #3
    Join Date
    Aug 2002
    Posts
    3,669
    You may want to search. This has been brought up many times. They are not recommended as the flow is poor.

  4. #4
    Join Date
    May 2003
    Location
    York, PA
    Posts
    523
    Some people say even stock is better then them, but I cant see how since the ports, tubes, and collectors are all bigger. I understand there is an "art" to sizes, and bigger is not always better, but I like them over stock...

  5. #5
    Join Date
    Dec 2009
    Location
    Charleston, South Carolina
    Posts
    89
    A "ported" manifold may flow better than the mustang header but I agree with Bacondoggy, I can't see why they would flow worse than stock. By the way, I don't have any hard numbers, just speculating. Of course long tubes would be better, and the work required to get them to fit may not make it worthwhile if you can port the stock manifolds.

  6. #6
    Join Date
    Aug 2002
    Location
    Jersey Shore, PA
    Posts
    1,875
    The only real advantage that I could see for a moderate power level would be eliminating the stock cast manifolds which are heavy and have tendency towards warping causing exhaust leaks. Otherwise, for the cost and time involved one would be better off spending on other proven parts for more immdiate gains.

  7. #7
    Join Date
    Apr 2005
    Location
    Nor Cal
    Posts
    2,985
    Quote Originally Posted by STEVE29 View Post
    A "ported" manifold may flow better than the mustang header but I agree with Bacondoggy, I can't see why they would flow worse than stock. By the way, I don't have any hard numbers, just speculating. Of course long tubes would be better, and the work required to get them to fit may not make it worthwhile if you can port the stock manifolds.
    We can all "speculate", but the fact is the tests were done years ago, the actual numbers are still on these forums. There were never any "Ported" manifold tested.

    Do a search .. here are some words to try .. Header + Results + Testing.


    - Dan

  8. #8
    Join Date
    Oct 2004
    Location
    Metro Denver Area
    Posts
    2,514
    Here is a link to the post, Dave did a bunch of work on this.

    http://www.sccoa.com/forums/showthre...e+exhaust+dyno

    I'm quoting something he mentioned in the above link

    "One thing is very clear. The use of Mustang headers is a big mistake if you want to make power. Anyone who has them on their car might as well start making other plans. " -XR7Dave

  9. #9
    Join Date
    Dec 2009
    Location
    Charleston, South Carolina
    Posts
    89
    Quote Originally Posted by 90coug View Post
    Here is a link to the post, Dave did a bunch of work on this.

    http://www.sccoa.com/forums/showthre...e+exhaust+dyno
    Wow, that was a good read. I'm very surprised at the results.

  10. #10
    Join Date
    Sep 2004
    Location
    Herrin Illinois
    Posts
    3,437
    well Dave does it again I am going to port some manifolds! anyone have any tips on what you want to remove and how to do it?

  11. #11
    Join Date
    Dec 2009
    Location
    Toronto
    Posts
    2,103
    I'm in no way recommending this but;

    I saw a set of stock x manifolds flow tested after they had been etched with sulfuric acid.

    It left them looking stock for inspection but it did make a difference when flowed.

    Paul

  12. #12
    Join Date
    Sep 2004
    Location
    Herrin Illinois
    Posts
    3,437
    i saw the bums inside the port of the exhaust inlets was assuming you remove those and any casting marks that you can plainly see with an air grinder. If anyone has any tricks or tips let me know, I like saving time and this isnt a race car its a fun car to drive when I want. I have decided not to build it to the hilt because It runs so good as it is. I have a pair of coated rotors I am going to add along with a larger inner cooler 75 mm tb and maf 60 lb injectors and a tune. I am going to clean the engine up podercoat the valve covers and put all new belts and hoses on it and drive it! I have the extremely unpleasent task of replacing the drivers side motor mount ahead of me as soon as I can. I need a break from it right now because I just replaced the entire exhaust today!!

Similar Threads

  1. Mustang V6 Factory Headers
    By Ddubb in forum Parts for Sale
    Replies: 5
    Last Post: 11-28-2007, 07:51 PM
  2. Factory Mustang Headers
    By blackout50 in forum Technical Forum
    Replies: 1
    Last Post: 12-05-2005, 05:40 PM
  3. mustang headers
    By blackstallion94 in forum Technical Forum
    Replies: 3
    Last Post: 06-28-2004, 04:20 PM
  4. mustang headers
    By acb92sc in forum Technical Forum
    Replies: 0
    Last Post: 05-31-2004, 12:26 PM
  5. MAC Mustang headers or 96-96 TBird headers?
    By black94tbirdsc in forum Technical Forum
    Replies: 0
    Last Post: 01-01-2003, 02:29 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •