4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

identify these headers?

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Old 04-19-2008, 03:02 PM
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MU71L4710N
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was told these are mac lt's for 99-04 2v's...can anyone confirm this from the pic? the 4v headers have ovals instead of circles right?
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Old 04-19-2008, 05:14 PM
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SXGT
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Default RE: identify these headers?

go to macs website and compare
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Old 04-19-2008, 05:24 PM
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35thAnni99GT
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Default RE: identify these headers?

honestly those look more like BBK's than MACs. MAC primaries are smallish (1 3/8) and the tubes don't bend back to be equal length (like it looks like for the #4 primary in that pic). I could be wrong though.
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Old 04-19-2008, 05:46 PM
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MU71L4710N
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Default RE: identify these headers?

they definately arent bbk's. this is the how-to for LT install on a new edge GT and he used BBK headers. the EGR fitting is on a different tube on mine, his pipes bend alot differently too. they look exactly like the headers on macs website but they dont always show the exact picture on websites (i.e. they will usually have the same header picture for the GT and the 4v's with a note that says "actual product may vary").

anyone got a pic of where the EGR is on mac longtubes? as much as i love my car its never going to be fast enuff so im selling all the car parts ive accumulated to buy a crotch rocket and i dont wanna falsely advertise something. i'm 99.999% sure these are mac lt's for 99-04 and they were said to bepreviously installed on a 99 GT but i want to be positive. bought them from some kid that my buddy works with and he isnt the most knowledgable about cars.

picture of driver side BBK header on the how-to:
http://www.fnsweet.com/garage/lt_install/drvrheader.jpg

picture of my drivers side:


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Old 04-19-2008, 05:48 PM
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35thAnni99GT
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Default RE: identify these headers?

Yeah then thats not a MAC header. My EGR fitting looks nothing like that.
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Old 04-19-2008, 06:01 PM
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MU71L4710N
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Default RE: identify these headers?

hmm...well i doubt mac has a different companies header pictured on their website because:

macs website:

http://www.macperformance.com/store/...Product_ID=886

look at the top picture. EGR fitting is on the third one from the left, bending up pointing to the right of the 4th one.


heres a picture of mine, nearly the same angle:



EGR is in the same spot. maybe they changed their design a little somewhere through the years?
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Old 04-19-2008, 06:05 PM
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Default RE: identify these headers?

ORIGINAL: MU71L4710N
EGR is in the same spot. maybe they changed their design a little somewhere through the years?
[] beat me to it
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Old 04-19-2008, 06:59 PM
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bluepony4.6
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Default RE: identify these headers?

Looks like MAC longtubes to me. They are the only longtubes for 2 valves that I noticed had individual flanges instead of one flange connecting all fourprimaries to the head.
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Old 04-19-2008, 07:15 PM
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Default RE: identify these headers?

ORIGINAL: bluepony4.6

Looks like MAC longtubes to me. They are the only longtubes for 2 valves that I noticed had individual flanges instead of one flange connecting all fourprimaries to the head.
never noticed that.

i was told they were macs for a 2v just wanted to confirm, everything ive seen backs it up.
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Old 04-20-2008, 07:06 PM
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98redstang
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Default RE: identify these headers?

yes they are mac i hav the same oneslaying around waiting to be put in
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