Hi there, I am looking at purchasing this 66. The muffler (pictured along the front side of the gas tank) is surprisingly quiet and definitely all wrong on any Mustang. I had original flowmaster 40s on my Foxbody which were great and no 'drone' issue at higher speed as the auto gearbox had overdrive to quieten things down just enough. So my question is what's the simplest muffler swap to do to get the right balance of sound at idle, when accelerating and when cruising - gearbox is a three speed auto. Thanks
Resolved Exhaust/Muffler tips
- Thread starter Tom77
- Start date
I picked videos that had the exhaust listed in either the title or the description.
View: https://youtube.com/shorts/3Z4boXMUcCI?feature=shared
View: https://youtu.be/tqVe2dlKLrI?feature=shared
This one is my favorite so far:
View: https://www.youtube.com/watch?v=aNRUcVKJXRo
This is Black Widow too:
View: https://www.youtube.com/watch?v=E3p3jQHTn1M
Not sure what sound you're into but the Black Widow would end the search for me.
View: https://youtube.com/shorts/3Z4boXMUcCI?feature=shared
View: https://youtu.be/tqVe2dlKLrI?feature=shared
This one is my favorite so far:
View: https://www.youtube.com/watch?v=aNRUcVKJXRo
This is Black Widow too:
View: https://www.youtube.com/watch?v=E3p3jQHTn1M
Not sure what sound you're into but the Black Widow would end the search for me.
I think your question is subjective, but here are my 2 Mustangs.
My Cobra isn't stock at all. It has a cam, long tubes to 2-1/2 H-pipe, pair of glass packs to act as resonators, then a pair of Thrush chambered muffler (40 series knock-offs) and dumped at the axle. I think I'd still like to quiet it down a little more, but it's not too bad.
View: https://youtu.be/-rq9tJ4ANdc
And here's my 87 GT. It's completely stock with the exception of a pair of Summit brand chambered mufflers. It's a lot quieter than the Cobra, but it still has it's cats.
View: https://youtu.be/CWW_8jHMlYo
My plans for the GT, when I start actually doing something with it, will be a set of shorty headers, 2-1/2" X-pipe, a pair of Flowmaster Delta Flow 50 series mufflers, and full length tail pipes. I'm not sure exactly, but I think that may end up giving me about what I'm looking for as far as how it sounds and how loud (or quiet....) it will be.
So I guess it all depends on what your individual tastes are, but YouTube can be a good resource to use when shopping for the exhaust you'd like. Another resource is to use Flowmaster's sound chart if you like their sound. Then you'd have some sort of reference to have an idea of how loud vs how quiet a particular offering may be.
My Cobra isn't stock at all. It has a cam, long tubes to 2-1/2 H-pipe, pair of glass packs to act as resonators, then a pair of Thrush chambered muffler (40 series knock-offs) and dumped at the axle. I think I'd still like to quiet it down a little more, but it's not too bad.
View: https://youtu.be/-rq9tJ4ANdc
And here's my 87 GT. It's completely stock with the exception of a pair of Summit brand chambered mufflers. It's a lot quieter than the Cobra, but it still has it's cats.
View: https://youtu.be/CWW_8jHMlYo
My plans for the GT, when I start actually doing something with it, will be a set of shorty headers, 2-1/2" X-pipe, a pair of Flowmaster Delta Flow 50 series mufflers, and full length tail pipes. I'm not sure exactly, but I think that may end up giving me about what I'm looking for as far as how it sounds and how loud (or quiet....) it will be.
So I guess it all depends on what your individual tastes are, but YouTube can be a good resource to use when shopping for the exhaust you'd like. Another resource is to use Flowmaster's sound chart if you like their sound. Then you'd have some sort of reference to have an idea of how loud vs how quiet a particular offering may be.
I picked videos that had the exhaust listed in either the title or the description.
View: https://youtube.com/shorts/3Z4boXMUcCI?feature=shared
View: https://youtu.be/tqVe2dlKLrI?feature=shared
This one is my favorite so far:
View: https://www.youtube.com/watch?v=aNRUcVKJXRo
This is Black Widow too:
View: https://www.youtube.com/watch?v=E3p3jQHTn1M
Not sure what sound you're into but the Black Widow would end the search for me.
Thank you!
I think your question is subjective, but here are my 2 Mustangs.
My Cobra isn't stock at all. It has a cam, long tubes to 2-1/2 H-pipe, pair of glass packs to act as resonators, then a pair of Thrush chambered muffler (40 series knock-offs) and dumped at the axle. I think I'd still like to quiet it down a little more, but it's not too bad.
View: https://youtu.be/-rq9tJ4ANdc
And here's my 87 GT. It's completely stock with the exception of a pair of Summit brand chambered mufflers. It's a lot quieter than the Cobra, but it still has it's cats.
View: https://youtu.be/CWW_8jHMlYo
My plans for the GT, when I start actually doing something with it, will be a set of shorty headers, 2-1/2" X-pipe, a pair of Flowmaster Delta Flow 50 series mufflers, and full length tail pipes. I'm not sure exactly, but I think that may end up giving me about what I'm looking for as far as how it sounds and how loud (or quiet....) it will be.
So I guess it all depends on what your individual tastes are, but YouTube can be a good resource to use when shopping for the exhaust you'd like. Another resource is to use Flowmaster's sound chart if you like their sound. Then you'd have some sort of reference to have an idea of how loud vs how quiet a particular offering may be.
Very helpful, many thanks
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