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Quiet down a 5.0 with headers?

aarongold2004

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Hey guys, I have a 5.0 with a Pypes X-Bomb and Valvetronics on it. I’m planning on doing headers (catted) but I don’t want the insane volume that comes with them. As of now I’m thinking I’ll throw some Vibrant Ultra Quiets on, but it’s really hard to find good comparison videos. If any of you guys have ideas or if you have a setup to quiet down your headers please let me know!
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Replace your x pipe with either stock resonator or a magnaflow 11386 resonator.
 

NGOT8R

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Hey guys, I have a 5.0 with a Pypes X-Bomb and Valvetronics on it. I’m planning on doing headers (catted) but I don’t want the insane volume that comes with them. As of now I’m thinking I’ll throw some Vibrant Ultra Quiets on, but it’s really hard to find good comparison videos. If any of you guys have ideas or if you have a setup to quiet down your headers please let me know!
It still won’t be quiet with the Vibrants. I have Catless LTHs, Vibrant mini race mufflers and a Steeda axle back with round mufflers that look like the Ultra Quiets and it is still very loud.
 

Jasonb543

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I had the true dual 3” jones max flow welded in where my resonator was, now it’s almost quieter than stock … sounds tits, it’s an X

IMG_2568.webp
 
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aarongold2004

aarongold2004

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I had the true dual 3” jones max flow welded in where my resonator was, now it’s almost quieter than stock … sounds tits, it’s an X

IMG_2568.jpg
Quieter than stock with headers just adding this muffler?? Do you have any videos you could send me?
 

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Jasonb543

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No, but I have stock active, so when I start it in quiet it’s fantastic, and when it idles down there is zero rumble, just compressor noise from the whipple.

I’ll try to do a quiet start vid next time out in the garage
 

Cobra Jet

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First:
1744726490313-80.webp

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Ok…. Explain how it make sense that one with a performance car modifies the exhaust so it’s more free flowing, louder, and sounds better - but then wants to add back components to choke it and make it quieter to near stock levels….

LMAO 🤣

Waste of time and $$$ - either go all in or just leave the exhaust stock if a modified exhaust bothers your ears… and if you’re worried about it bothering other people’s ears, drive by them faster so they won’t hear you as long. :)

Go headers and go loud.

My both my 94 and 93 Mustang 5.0’s have LT’s with aftermarket 2.5” exhaust - they both are loud at idle, loud when driving through the gears or when cruising, and very loud at WOT…. It sounds great and I could care less who thinks otherwise. All of my 5.0 Mustangs have always been loud…. IMO, if it’s too loud when you’re next to me on a road or highway, use your go pedal or brake pedal to distance yourself…. :devil:

Plus for those in HOA developments or communities - you know where you’re living, you know your bylaws, you know your bitchy neighbors, so if you want loud and have to stuff potatoes or pool noodles into your exhaust tails before you start it every morning, who’s fault is that…
 
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aarongold2004

aarongold2004

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First:
1744726490313-80.jpg

-

Ok…. Explain how it make sense that one with a performance car modifies the exhaust so it’s more free flowing, louder, and sounds better - but then wants to add back components to choke it and make it quieter to near stock levels….

LMAO 🤣

Waste of time and $$$ - either go all in or just leave the exhaust stock if a modified exhaust bothers your ears… and if you’re worried about it bothering other people’s ears, drive by them faster so they won’t hear you as long. :)

Go headers and go loud.

My both my 94 and 93 Mustang 5.0’s have LT’s with aftermarket 2.5” exhaust - they both are loud at idle, loud when driving through the gears or when cruising, and very loud at WOT…. It sounds great and I could care less who thinks otherwise. All of my 5.0 Mustangs have always been loud…. IMO, if it’s too loud when you’re next to me on a road or highway, use your go pedal or brake pedal to distance yourself…. :devil:

Plus for those in HOA developments or communities - you know where you’re living, you know your bylaws, you know your bitchy neighbors, so if you want loud and have to stuff potatoes or pool noodles into your exhaust tails before you start it every morning, who’s fault is that…
I’m in college. My parents are in an HOA, and I’m living in a rental community with 2 friends. It’s close to campus and practical. I’m not moving so I can have a loud car. It’s just common decency to not wake up my neighbors every morning because trust me, the walls on these houses are paper thin, and a straight piped 5.0 will actually wake up half the street.
 

Cobra Jet

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If you don't want loud don't put headers on it. Period. You don't get much power from it anyway. You're going to spend like $2,000 for what?
Exactly ^^^.

The factory headers are more than enough performance for the street and how the car was built. In fact, the Coyote 5.0 headers are the most free flowing and least restrictive design of ANY previous Mustang 5.0/302 factory header ever available.

Putting on larger shorty headers (equal length or non-equal length with greater primary tube diameters and greater collector opening) OR installing a set of LT headers (with greater primary length, larger primary tube diameter, and larger collector) IS going to increase exhaust volume and loudness, period.

As @robvas stated, the cost to buy and replace the factory Coyote header on a daily driven street Mustang has no other gains than just sound. You’re not going to feel any difference with a street car and if the car is NEVER taken to a track you will never even see any “gains” to know or log.

If you’re in a college area or HOA and you already know that exhaust sound is an issue or concern for your surroundings, then take the $$$ you would use for headers and use it for other mods where it will benefit better for a street driven Mustang.

Your $$$, your car, your living conditions - we’re just here to give guidance, take it or leave it. IMO, most of us on here will advise correctly and really don’t want to see folks wasting money (and time) if there really isn’t any benefit/gains to their situation and how the car is used. if you’re already in a situation where you KNOW there will be concerns RE: your vehicle with LOUDer exhaust, then you’re going to encounter complaints and/or noise violation tickets IF your local cops have dB meters or crack down on public noise nuisances.

Old school trick that still exists and is done today:
You can also get a louder exhaust without header upgrades too just by getting electric dump valves installed before the mufflers (or before resonator for those that still have resonators) …. By doing that, YOU can control when it’s “open exhaust” or closed for normal sound. Open dumps is also way louder than adding any set of headers… LOL
 

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Gen3javi

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Get a set of vibrant 1792 resonators they clean up the sound a lot
 

LethalSteveG

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Not sure if you want to swap but mine with LTH Exhaust headers without cats with the Borla S-Type with the Borla resonator is quiter than those with just Corsa Xtreme catbacks. No drone and tons of compliments.

Just an option if you are looking instead of piecing things together. this is what I run. Being you have a Gen2, it just is the single tip version.

https://www.lethalperformance.com/b...8-2023-mustang-w-o-active-exhaust-140745.html

https://www.lethalperformance.com/b...2018-2024-mustang-gt-mach-1-bullit-60661.html

For yours, it would be this one:
https://www.lethalperformance.com/b...s-steel-tips-2015-2017-mustang-gt-140629.html

https://www.lethalperformance.com/b...tang-gt-2024-mustang-gt-non-active-60561.html
 
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aarongold2004

aarongold2004

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If you don't want loud don't put headers on it. Period. You don't get much power from it anyway. You're going to spend like $2,000 for what?
Headers absolutely add solid power.
Not sure if you want to swap but mine with LTH Exhaust headers without cats with the Borla S-Type with the Borla resonator is quiter than those with just Corsa Xtreme catbacks. No drone and tons of compliments.

Just an option if you are looking instead of piecing things together. this is what I run. Being you have a Gen2, it just is the single tip version.

https://www.lethalperformance.com/b...8-2023-mustang-w-o-active-exhaust-140745.html

https://www.lethalperformance.com/b...2018-2024-mustang-gt-mach-1-bullit-60661.html

For yours, it would be this one:
https://www.lethalperformance.com/b...s-steel-tips-2015-2017-mustang-gt-140629.html

https://www.lethalperformance.com/b...tang-gt-2024-mustang-gt-non-active-60561.html
I may consider that mid pipe, especially because coyotes seem sensitive to x pipes and h pipes for their quality of sound. And of course nicer ones usually sound better. I’ve been considering the Magnaflow 11386 that someone else recommended, but there’s doesn’t seem to be any videos of them on 5.0s that I can find. Also I did a quad conversion when I put my Valvetronics on ✌
 
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aarongold2004

aarongold2004

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$2,000 worth?

How much do you think you're going to see? Just checking expectations.
I mean it’s hard to justify any power mod really. Seems to me like everything past intake and tune is diminishing returns unless you’re talking about boost. Based on what I’m seeing, I’d expect maybe 20-25hp peak and hopefully a larger gain elsewhere in the power band. I reached out to my tuner (he’s a good guy, runs his own business locally and does dyno tunes and all that) to get his opinion. He’ll give me an accurate estimate based on his experiences. Also I do want to note that I’ll be doing a GT350 manifold at the same time as the headers.
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