GT Performance Mods 2005+ Mustang GT Performance and Technical Information

Installed original 40 Series Flowmasters

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Old 4/7/07, 04:19 PM
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Installed original 40 Series Flowmasters

Originally I had the Flowmaster American Thunder axlebacks on my Mustang with a Pypes o/r h-pipe. I wanted to see how it would sound with the "original" 40 Series Flows because it still wasnt quite the sound I was looking for, so I had them installed and man....what a difference!! They are so much deeper sounding than the AT's. Volume is about the same, it may even be a bit quieter....but it sounds so smooth and it doesnt make that trumpet sound all the time. Well, it still does at 2500 rpm, but not at bad as the AT's. I think if you are looking for that Flowmaster sound and you have an o/r setup...these are the way to go! I am very satisfied!! The guy who put them on made them so I can take them off if I want to. He charged me $285, which was a pretty sweet deal if you ask me. He put on a set of 2.5" tips and it looks just like stock. I really wasnt much for the big 4" tips anyway.
Old 4/7/07, 04:23 PM
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Interesting. I have the AT's on the '05 GT and the 40's on my Mark VIII.
I agree that the 40's have a deeper sound.
Old 4/7/07, 05:08 PM
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I perfer the sound of the borlas, but like the sound of the flows as well
Old 4/7/07, 05:15 PM
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wow... so you still have them mounted in the back
Old 4/7/07, 06:56 PM
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Let's hear a sound clip.
Old 4/7/07, 07:35 PM
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Originally Posted by WuTimeUT
wow... so you still have them mounted in the back
Wondering the same thing, did you essentially make your own axle-back?
Old 4/7/07, 09:43 PM
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Nice

I'm a fan of no mufflers myself now
Old 4/8/07, 07:25 AM
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Post a sound clip.
Old 4/8/07, 08:39 AM
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Originally Posted by 302svt
Post a sound clip.
+3...
Old 4/8/07, 09:01 AM
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I also want to hear them and know where you mounted them?
Old 4/8/07, 09:48 AM
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Same here, if possible, post some pics of where you mounted them, I'm curious to see this.
Old 4/9/07, 06:02 AM
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Hey guys, sorry for the delayed response. I will try to get some pics up, but I dont have any way to get a sound clip right now. All I can say is if you have an o/r setup with the AT Flows, the original 40's are much deeper and mellow. I really like it!
They are mounted in the same location as before. Essentially the guy who made them, made them just like any regular axleback kit. I can take them off if I want, just like before. He did an awesome job. It looks better than the kit from Flowmaster.
I will try to get some pics up.
Old 4/9/07, 07:56 AM
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Originally Posted by holeshot
Originally I had the Flowmaster American Thunder axlebacks on my Mustang with a Pypes o/r h-pipe. I wanted to see how it would sound with the "original" 40 Series Flows because it still wasnt quite the sound I was looking for, so I had them installed and man....what a difference!! They are so much deeper sounding than the AT's. Volume is about the same, it may even be a bit quieter....but it sounds so smooth and it doesnt make that trumpet sound all the time. Well, it still does at 2500 rpm, but not at bad as the AT's. I think if you are looking for that Flowmaster sound and you have an o/r setup...these are the way to go! I am very satisfied!! The guy who put them on made them so I can take them off if I want to. He charged me $285, which was a pretty sweet deal if you ask me. He put on a set of 2.5" tips and it looks just like stock. I really wasnt much for the big 4" tips anyway.

Great choice I have the same ones installed and love the sound.
Old 4/10/07, 12:13 PM
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Edit: Nevermind. I picked up a set of GTA's and I love 'em.
Old 4/10/07, 02:41 PM
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holeshot,

I'm in northwest IN.
If you are near let me know I can help with the sound file.

PLUS... I really wanna hear your car.
Old 4/10/07, 06:13 PM
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Originally Posted by INTRUDER
holeshot,

I'm in northwest IN.
If you are near let me know I can help with the sound file.

PLUS... I really wanna hear your car.

I am in southeast Indiana. If you are anywhere near West Lafayette, I will be up there visiting Purdue in a couple weeks to party. Maybe you could hear it then? Then we will get hammered. haha.

I am in the process of getting some clips made for you guys.
Old 4/12/07, 05:47 AM
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I finally got around to getting a clip. I recorded it with my camera and it was kinda windy outside. Hopefully you can at least get an idea of how it sounds.

http://www.youtube.com/watch?v=NErPCg05n5I
Old 4/12/07, 06:07 PM
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I love the sound, please post some pics. Id love to do a similar set up on my 07.
Old 4/12/07, 06:43 PM
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that sounds really good... from the clip, it sounds better than the flowmaster axleback.

I just PM'd you a couple of questions.
Old 4/12/07, 09:23 PM
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Any Drone?


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