2003 Cobra exhaust manifold versus other DOHC

[sparky1562]

Is there any difference in the stock cast iron exhaust manifolds on the Cobra versus the other DOHC engines?
Searching for new ones, it list one model number for all, but the SC Cobra is not listed in what I can find????
I have "96" mustang manifolds and I am just wondering. (I dont have room for long tube headers and I dont think shortys are work the extra money!).

[Vortech347]

Most guys use the Cobra manifolds so they can bolt up a mustang X/H-pipe. I've debated on doing this myself.

[sparky1562]

But what is the physical difference in them? why would the x pipe make a difference? not sure I understand that part...but I am a little dense!

[ChiTownMaraud3r]

I was just about to start a thread about this exact same question. What the physical difference is between the termi manifolds vs the mach 1 or Marauder stock exhaust..

From my understanding, the MM has a 2" exhaust before the stock H pipe..are the cobra manifolds larger in diameter to the x/h?

Sparky, the x-pipe is what gives these motors that higher pitched raspy muscle sound. The H pipes generally are a lower toned hot rod muscle sound.

[Zack]

The marauder has dual ball flanges and the Cobra passenger side has a flat flange with gasket.
I used Cobra manifolds on my Turbo project
http://i307.photobucket.com/albums/nn306/Marauder-Z/Blue%20MM%20Rebuild/100_3874_zps9484e018.jpg (http://s307.photobucket.com/user/Marauder-Z/media/Blue%20MM%20Rebuild/100_3874_zps9484e018.jpg.html)
http://i307.photobucket.com/albums/nn306/Marauder-Z/Blue%20MM%20Rebuild/100_3753.jpg (http://s307.photobucket.com/user/Marauder-Z/media/Blue%20MM%20Rebuild/100_3753.jpg.html)
http://i307.photobucket.com/albums/nn306/Marauder-Z/Blue%20MM%20Rebuild/100_3871_zps4883a104.jpg (http://s307.photobucket.com/user/Marauder-Z/media/Blue%20MM%20Rebuild/100_3871_zps4883a104.jpg.html)
http://i307.photobucket.com/albums/nn306/Marauder-Z/Blue%20MM%20Rebuild/CB2CE41A-3570-45F2-8DAE-A33BE665DC20_zpsrtvcoefp.jpg (http://s307.photobucket.com/user/Marauder-Z/media/Blue%20MM%20Rebuild/CB2CE41A-3570-45F2-8DAE-A33BE665DC20_zpsrtvcoefp.jpg.h tml)

[L.Mark]

So if you replaced the X with the H would it completely change the way the car sounds??? Factory stock or whatever setup you've got???

[ChiTownMaraud3r]

The marauder has dual ball flanges and the Cobra passenger side has a flat flange with gasket.
I used Cobra manifolds on my Turbo project
http://i307.photobucket.com/albums/nn306/Marauder-Z/Blue%20MM%20Rebuild/100_3874_zps9484e018.jpg (http://s307.photobucket.com/user/Marauder-Z/media/Blue%20MM%20Rebuild/100_3874_zps9484e018.jpg.html)
http://i307.photobucket.com/albums/nn306/Marauder-Z/Blue%20MM%20Rebuild/100_3753.jpg (http://s307.photobucket.com/user/Marauder-Z/media/Blue%20MM%20Rebuild/100_3753.jpg.html)
http://i307.photobucket.com/albums/nn306/Marauder-Z/Blue%20MM%20Rebuild/100_3871_zps4883a104.jpg (http://s307.photobucket.com/user/Marauder-Z/media/Blue%20MM%20Rebuild/100_3871_zps4883a104.jpg.html)
http://i307.photobucket.com/albums/nn306/Marauder-Z/Blue%20MM%20Rebuild/CB2CE41A-3570-45F2-8DAE-A33BE665DC20_zpsrtvcoefp.jpg (http://s307.photobucket.com/user/Marauder-Z/media/Blue%20MM%20Rebuild/CB2CE41A-3570-45F2-8DAE-A33BE665DC20_zpsrtvcoefp.jpg.h tml)


:eek: What the....!

Welcome back brotha :bows:

[massacre]

Never mind lol

[Vortech347]

Like Zack said, different flanges. The factory Marauder H-pipe is AWEFUL. It chokes down big time. It still surprises me NO ONE came out with a bolt in X or H pipe for these things. I talked to Dr Gas and they sounded interested but wanted my car for a few weeks. Its a daily that I use for business so that was out of the question.

[Zack]

The manifolds themselves are larger too, and cast with a wave in them. (I'm sure for increased flow characteristics but not sure.)
Cobra Guys make 700rwhp all day with stock manifolds

[sparky1562]

The manifolds themselves are larger too, and cast with a wave in them.

That is what i was looking for. Any measurements on the ports?

So if I am running 01 C heads, and under 500hp, will I see a difference with 03 Cobra manifolds over the 99-04 Mustang manifolds I have? (Dorman cat number 674453 and 674457 for reference). I couldnt find a number for the Cobra or Marauder on Rock Auto, but the Marquis is a different number/design.

I found a picture! I see the wave, but not a good shot of the ports. I see the flat flange on the one side.

[Zack]

That's a question no one really ever found an answer to.

I'd use the Cobra manifolds. You can get them for 50 bucks used

[sparky1562]

That's a question no one really ever found an answer to.

I'd use the Cobra manifolds. You can get them for 50 bucks used
$50 each? I see a couple on ebay for $ 119 plus shipping. Seems high to me.
Been looking all day...

[Zack]

They are 50-80 used for the pair all day long on forums, and especially Facebook in the classifieds groups

[dohc324ci]

I got mine from svtperformance.com shipped for $50.

[Marauderjack]

So if you replaced the X with the H would it completely change the way the car sounds??? Factory stock or whatever setup you've got???

Yes.....most X-Pipes sound high pitched and zippy...the one I had fabricated sounded like a pair of mad Hondas with "Fart Cans" on 'em!!:mad2::argue::bigcry:

The H-Pipe is more mellow with a lower tone and more of an "Old School" burble!!:beer::bows:

[ctrlraven]

They are 50-80 used for the pair all day long on forums, and especially Facebook in the classifieds groups
Yep!

I have a set for sale for $50 shipped right now.
http://www.mercurymarauder.net/forums/showthread.php?t=90767

[Guittard22]

The marauder has dual ball flanges and the Cobra passenger side has a flat flange with gasket.
I used Cobra manifolds on my Turbo project
http://i307.photobucket.com/albums/nn306/Marauder-Z/Blue%20MM%20Rebuild/100_3874_zps9484e018.jpg (http://s307.photobucket.com/user/Marauder-Z/media/Blue%20MM%20Rebuild/100_3874_zps9484e018.jpg.html)
http://i307.photobucket.com/albums/nn306/Marauder-Z/Blue%20MM%20Rebuild/100_3753.jpg (http://s307.photobucket.com/user/Marauder-Z/media/Blue%20MM%20Rebuild/100_3753.jpg.html)
http://i307.photobucket.com/albums/nn306/Marauder-Z/Blue%20MM%20Rebuild/100_3871_zps4883a104.jpg (http://s307.photobucket.com/user/Marauder-Z/media/Blue%20MM%20Rebuild/100_3871_zps4883a104.jpg.html)
http://i307.photobucket.com/albums/nn306/Marauder-Z/Blue%20MM%20Rebuild/CB2CE41A-3570-45F2-8DAE-A33BE665DC20_zpsrtvcoefp.jpg (http://s307.photobucket.com/user/Marauder-Z/media/Blue%20MM%20Rebuild/CB2CE41A-3570-45F2-8DAE-A33BE665DC20_zpsrtvcoefp.jpg.h tml)





Love that color covers you got !!!!

[Zack]

Love that color covers you got !!!!

Thanks, You're the only one!
Its called Plum Wrinkle.

[Guittard22]

^^^^
That a custom job ? Got a close up's of the sides ? There diffrabt but in a good way You Definitely went out side the box on that color .I got punisher logo coil covers – that's just me though it's all what you like and what you want to look at every day Different is key.

[dohc324ci]

Yep!

I have a set for sale for $50 shipped right now.
http://www.mercurymarauder.net/forums/showthread.php?t=90767

I wouldn't pass these up for $50 shipped!


Yes.....most X-Pipes sound high pitched and zippy...the one I had fabricated sounded like a pair of mad Hondas with "Fart Cans" on 'em!!:mad2::argue::bigcry:

The H-Pipe is more mellow with a lower tone and more of an "Old School" burble!!:beer::bows:
Depends on taste...I have an X pipe with Corsa db blacks that has a raspy growl but cmon man to compare it to a Honda??? lol

http://www.youtube.com/watch?v=ZhfyyZJoP4Q

[sparky1562]

I don't think these look any different from the "Cobra" exhaust manifolds that I posted the other day. Other than that flat flange on the passenger side. The new looking one is the "99" Driver side and the rusty one with the air fitting is the stock passenger 96 Mark VIII.

[L.Mark]

Thanks, You're the only one!
Its called Plum Wrinkle.

They're not bad...need to paint the car to match...that would be sweet!!!

[RacerX]

I have some sitting around. I port matched them to the MM heads and hogged them out in areas they saw a bit of restriction. Better than MM stockers, but, as Zack said, you need to get cobra exhaust from the headers down to the end of the H pipe.

http://www.mercurymarauder.net/gallery/data/579/medium/IMG_0655a.jpg (javascript:;)

[sparky1562]

I have some sitting around. I port matched them to the MM heads and hogged them out in areas they saw a bit of restriction. Better than MM stockers, but, as Zack said, you need to get cobra exhaust from the headers down to the end of the H pipe.

I understand the difference from the manifold flange back, my original question was is there any difference in the stock exhaust manifold on the cobra from other DOHC engines. Other than the passenger side being Flanged, I don't see one.

[RacerX]

I said yes above, they have better flow than the MM stockers.

[sparky1562]

I said yes above, they have better flow than the MM stockers.
Yes to what? :) Yes they are the same or yes they are different?

I dont see any physical difference in the stock cast manifold shape or dimensions of the stock ports in the exhaust manifold. I have not found anything difinitive that gives the dimensions of the port openings, other than one person that gave me 48mm x 25 mm as the stock openings, which matches pretty much what I measured on the ones in the pictures (99 Mustang and 96 Mrk VIII versions).

The only difference is the one flange. I am going with that!

Thanks!

[RacerX]

If I **** them down, side by side in a position as they would be installed, you will see an obvious difference in the way they are manufactured for better flow. Maybe not a lot, but, it's there. Is it worth using them because of other exhaust parts needed, probably not. I'll see if I can take a better pic later today.

[Glenn]

You may want to look for the Ford Racing Mustang Cobra shorty headers - M-9430-E465 (ceramic coated or -E464 SS version). They are no longer available from FR. I installed these years ago and then used the Magnaflow Cobra X-Pipe (#48026 - w/hiflow CATS) into the stock MM mufflers. Sound was a little louder then stock. Set-up worked good with my MM and SC during my drag racing days.

Magnaflow Catted Tru-X X-Pipe (99-04 4.6L)

http://ep.yimg.com/ay/mustangtuning/smoked-led-tail-lights-87-93-all-15.jpg
http://s7d4.scene7.com/s7viewers//dhtml/images/spacer.gif

http://images.americanmuscle.com/is/image/Turn5/48026?$s7product$&rect=0,0,400,289&scl=1.1725&id=m3pq91

Great to see Zack back on the forum. He is a huge wealth of MM information and technical help.

[ctrlraven]

MMR says they sell the Cobra shorty headers $570.00
http://www.modularmotorsportsracing.c om/ (Click PRODUCTS then Click on EXHAUST)

[lji372]

If I **** them down, side by side in a position as they would be installed, you will see an obvious difference in the way they are manufactured for better flow. Maybe not a lot, but, it's there. Is it worth using them because of other exhaust parts needed, probably not. I'll see if I can take a better pic later today.

So your saying they're the same but different:confused:

:lol:

:D

[RacerX]

I'm saying that the Cobra logs are made to be a little better than the mm logs. Since I can't say ****... Blumpkin!

http://www.mercurymarauder.net/gallery/data/579/medium/Cobra_Manifold.jpg (javascript:;)

[lji372]

And that Samuel Adams is the choice of refreshment while installing?

[Baaad GN]

Damn now that Zack is back I'm gonna have to change some stuff!!!!!!!!!!!!!