Turbo Manifolds

RielyHodge

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I am looking to twin turbo my 2005 Mustang GT. I am going to build the engine to make sure it can handle the power. The problem is I am going to build my own turbo kit, but I am hoping that there is an off the shelf solution for turbo manifolds, or if I can flip the stock exhaust manifolds around to run to the turbos. If nobody knows where to find them, then I'll either have to scrap the plan or fabricate turbo manifolds, so help would be extremely appreciated.
 

86GT351

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ON3 makes a great inexpensive kit with an exhaust header upgrade option. Maybe they sell them separately.
 

RielyHodge

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The only thing they have are headers that are good for their single turbo kit. I appreciate the help though.
 

MrBhp

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The last twin kit I saw had the turbos mounted under the car. I didn't like it much. They were really low. A single just barely fits, with modifications.

FWIW, my nephew built a 2007 with twins for a customer. He never came close to beating my single, or having my drivability.
 

AHaze

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If by "flipping the stock manifolds" you mean leave them on the same side but flip them up-side down, I don't see it working. The exhaust ports are D shaped with the flat spot on the bottom. I don't have my car here to check but just holding a stock manifold, it looks to me like the outlets would be pointed at the frame rails as well.
You may be able to flip the manifolds side to side (so the outlets point forward and down) but there's a lot of stuff at the front of the engine that would likely have to be relocated.
The Hooker Blackheart shorties look to me like they could potentially be modified to be flipped either upside-down (the flange ports are round, not the stock D shaped) or L/R and point forward with minimal fabrication. No way to know for sure without buying a set though.
 

AHaze

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/\ Well, there you have it... top mounted twins.
I had no idea that kit existed. It looks like one turbo sits in the stock battery location while the other occupies the OE air box space. I'm sure it's fine functionally but not sure I dig how that's gonna look with the hood open.
 

RielyHodge

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If by "flipping the stock manifolds" you mean leave them on the same side but flip them up-side down
That is exactly what I meant.

Google is your friend… also a custom fabricator can easily make this for you, it’s just money $$$$


I found these ones, but like AHaze said, they won't look aesthetically pleasing, I was hoping for something that would let me put them in the front of the engine bay something like this:

Screenshot 2025-04-17 142017.pngScreenshot 2025-04-17 142108.png

By the time I actually get this project going, I'll know how to do some welding, so I'm not too worried about fabricating them, I just thought it would have been much easier to use a premade solution.
 

JC SSP

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Corvettes have longer engine bays than Mustangs...

I have never been for SHOW, I am strictly for GO! LOL
 

RielyHodge

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Yeah, I want to make it look sick and go fast, its probably a bit unrealistic, but I'm gonna try to make it work, I have looked down into my engine bay and it looks like there is some space, but I'll have to relocate some things. I appreciate the help, even if it sounds like I'm gonna have to fabricate headers to do what I am hoping to do.
 

AHaze

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I don't think any stock replacement shorty headers will work flipped upside-down because of where the outlets will be pointed.
That said, starting with those and modifying the collector end should be easier than fabricating something from scratch.
 

whitmanink

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welp . i was gonna go with an on3 turbo kit,, or a cx racing kit,,
but ..
seeing how i already have a battery relocation to the trunk,
already have an a\c delete ..
have a tig welder at home..

i think im gonna try to make my own turbo,
im still looking at ways i wanna run it .
and still finding where to source the corrcet tubing and all.

but in a few months ill have sumthing started and will log it on here.

in the mean time im always looking at wat others did and what can be done
 

MrBhp

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Modified On3 kit is probably the way to go. That's what I did, but I didn't want a twin set-up.
 

RielyHodge

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welp . i was gonna go with an on3 turbo kit,, or a cx racing kit,,
but ..
seeing how i already have a battery relocation to the trunk,
already have an a\c delete ..
have a tig welder at home..

i think im gonna try to make my own turbo,
im still looking at ways i wanna run it .
and still finding where to source the corrcet tubing and all.

but in a few months ill have sumthing started and will log it on here.

in the mean time im always looking at wat others did and what can be done
Definitely let me know
 

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