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Old 12-15-2014, 08:09 AM   #1
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Mustang exhaust size

Two question.

Should I run 2.5 exhaust or 3?

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Can you run cat back exhaust set up like these Cobras on a GT?


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Old 12-15-2014, 08:51 AM   #2
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if your referring to the pipes showing underneath, i believe that is because of the independent rear suspension. Otherwise i wish my exaust could show like that on my gt.
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Old 12-15-2014, 09:06 AM   #3
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Originally Posted by fenixignition View Post
if your referring to the pipes showing underneath, i believe that is because of the independent rear suspension. Otherwise i wish my exaust could show like that on my gt.

So your saying I could get that set up? I like how it looks for appearance, just something I always find to be a sweet set up


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Old 12-15-2014, 09:13 AM   #4
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as far as i understand, not with our rear axles.



See that loop it makes going up and down? our rear axle fits through that.

below, youl see in place of a straight axle is exaust pipes. the cv axles in the cobras arent in the same positioning as our solid axles. Idk what amount of modification is needed to make it happen on ours except for a IRS conversion.


But after a quik google search, it appears a few people with mach 1's made it work. apparently it just sits a little bit lower than the cobras. Just gotta get creative with the hangers probably.
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Old 12-15-2014, 09:30 AM   #5
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Quote:
Originally Posted by fenixignition View Post
as far as i understand, not with our rear axles.



See that loop it makes going up and down? our rear axle fits through that.

below, youl see in place of a straight axle is exaust pipes. the cv axles in the cobras arent in the same positioning as our solid axles. Idk what amount of modification is needed to make it happen on ours except for a IRS conversion.


But after a quik google search, it appears a few people with mach 1's made it work. apparently it just sits a little bit lower than the cobras. Just gotta get creative with the hangers probably.

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My friend on insta has a GT and just did this set up. I was curious to if it was simple to do. This is a GT


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Old 12-15-2014, 09:38 AM   #6
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3" is unnecessary as far as power and exhaust flow goes for a bolt-on GT. You can install the IRS exhaust but every time you lift up the vehicle you will need to remove it or the axle will crush
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Old 12-15-2014, 09:38 AM   #7
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I wouldnt think much major modification is involved, unless he changed out his rear end. But if its true that it works, and just sits a little lower, then it just seemed like a few exhaust hanger points are different.

Didnt see mile highs post until after i posted mine. Thats a pretty big drawback.
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Old 12-15-2014, 10:23 AM   #8
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Originally Posted by fenixignition View Post
I wouldnt think much major modification is involved, unless he changed out his rear end. But if its true that it works, and just sits a little lower, then it just seemed like a few exhaust hanger points are different.

Didnt see mile highs post until after i posted mine. Thats a pretty big drawback.

I don't know why it posted twice, but I was planning on not doing long tube headers. Just getting a mid pipe. And I was gonna do 2.5 pipes


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Old 12-15-2014, 11:05 AM   #9
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A member on here named Lowflyn did that on his cobra, it's SRA swapped, and he just made some brackets to support the middle of the catback and if I remember right he added a sort of quick disconnect for it. Unfortunately he doesn't really frequent this forum any more and I don't know that he ever made a write-up on how to do it
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Old 12-15-2014, 11:38 AM   #10
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Originally Posted by Mile high JDF View Post
A member on here named Lowflyn did that on his cobra, it's SRA swapped, and he just made some brackets to support the middle of the catback and if I remember right he added a sort of quick disconnect for it. Unfortunately he doesn't really frequent this forum any more and I don't know that he ever made a write-up on how to do it

I just want my cat back pipes to look like that. They look awesome, but then again... Don't wanna like make my car look like a cobra when it's not.


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Old 12-15-2014, 12:24 PM   #11
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Just do an IRS Swap, that's what I did.
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Old 12-15-2014, 06:46 PM   #12
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2.5" is what you want. Yes you can run the IRS cat back on a gt, but its dumb as anytime you have to jack up the car you have to remove the tails.

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Old 12-15-2014, 07:33 PM   #13
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I thought about doing IRS exhaust. But I'm probably just going to run dumps behind the axle when I go with a Watts Link.


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Old 12-15-2014, 08:08 PM   #14
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I thought about doing IRS exhaust. But I'm probably just going to run dumps behind the axle when I go with a Watts Link.


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Steeda side exhaust. Mmmmmmmmm...
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Old 12-15-2014, 08:16 PM   #15
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Just do an IRS Swap, that's what I did.

Link to the irs swap?


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Old 12-15-2014, 08:39 PM   #16
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Link to the irs swap?


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There's plenty of info out there about them. Just gotta find a Cobra owner who wants a SRA for drag racing purposes
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Old 12-15-2014, 08:46 PM   #17
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On a 99+ its pretty straightforward. Biggest issue ppl run into are the brake lines and E brake cables. The IRS itself bolts right in. Few other things but its not bad. Even on a 98-down its not too much more. 94-98 cars its basically the same except you need to weld the front brackets on. Ppl try to drill/tap the sheetmetal or rig up spacers in between the trunk and the unibody but that's all hackjob ways of doing it. The fox is a little more complex but there are IRS foxes out there.
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Old 12-15-2014, 08:51 PM   #18
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I'll add that on mine I didn't have issues with brake lines, but my e-brake cables are a little short so it makes the e-book really toght. The only other issue is that my driveshaft is like a half inch too long and the rear diff needs unbolted in order to remove it
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