Manifold replacement

Discussion in 'Classic Mustang Specific Tech' started by mhjo, Aug 25, 2003.


  1. mhjo

    mhjo Founding Member

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    I have a 289 wich is upgraded with new 4 port carb., new intake, cam and lifters and a silent dual exhaust system.

    AS a "final touch", I have been advised to upgrade the stock manifolds. I have been given several alternatives:

    1. Try to find HiPo manifold (difficult here)
    2. Use a 351 manifold (do they really fit a 289?)
    3. Use shorty headers

    As I am not a fan of load engine noise, I am a bit sceptical to headers. Someone hinted my about header-wrapping, but I don't know what that does to sound.

    Advice me please.
    #1
  2. Ozsum67

    Ozsum67 Too much thin air Founding Member

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    I saw some hy po ones on e bay last week off of a shelby. They might still be there. They were reasonable as I recall.
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  3. my66coupe

    my66coupe Founding Member

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    why not just pick up a set of hooker or hedmans? why do you want shorty style?? Do you not want to replace your exhaust? As for the header wrapping, I was told that it is very wrong to do it on a daily driven/street car. header wrapping does not reduce sound it is supposed to keep in the heat.

    Mike
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  4. mhjo

    mhjo Founding Member

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    People tell me that regular headers make such a nasty noise in the passanger compartement, and that shorty make less.
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  5. BobsBathouses

    BobsBathouses New Member

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    I've been pricing reproduction hipo's. Most Mustang Parts suppliers have them. What about 5.0 factory tube exhaust manifolds from the late 80's ?
    #5
  6. Ronstang

    Ronstang New Member

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    I personally like the sound of the original Tri-Y headers available from just about any Mustang parts house. They are reasonable quite with just a slight tinny sound....kind of nice on a car with quiet exhaust, on my Shelby the mufflers (if you can call them that) are so loud I can't hear them at all. Shorties will be the quietest but don't count the Tri-Ys out, too bad you can't find someone with them on a car to take a listen.
    #6

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