GT Performance Mods 2005+ Mustang GT Performance and Technical Information

those with LT headers and X pipe

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Old Jan 16, 2010 | 09:37 AM
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traffic142's Avatar
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those with LT headers and X pipe

I have long tube headers and x pipe. I have am thunder flows. I want a better rumble at idle. Has anyone.with this combo put a set of SLP loud mouths on and was happy with the result.

Last edited by traffic142; Jan 16, 2010 at 09:38 AM.
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Old Jan 16, 2010 | 06:53 PM
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SONICBOOST's Avatar
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IMO flows + x-pipe on this car = ditch flows or x.. Go with h or new muffs.. Its simple math lol

Last edited by SONICBOOST; Jan 16, 2010 at 06:54 PM.
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Old Jan 17, 2010 | 07:21 AM
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Slp does not have a H. I wonder if the loudmouths would do the trick.
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Old Jan 17, 2010 | 07:33 AM
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+2 on ditching the X for an H pipe. That will make a bigger difference than just the mufflers.
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Old Jan 17, 2010 | 09:10 AM
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I have heard a kooks LT with catted x and slp loudmouths and I can't stand the sound. It's ridiculously loud to the point my ears were ringing after he revved it.

That's just my opinoin though.
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Old Jan 17, 2010 | 10:22 AM
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Originally Posted by Dysan
I have heard a kooks LT with catted x and slp loudmouths and I can't stand the sound. It's ridiculously loud to the point my ears were ringing after he revved it.

That's just my opinoin though.

everyone else liked the sound, LOL including the cops
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Old Jan 17, 2010 | 10:24 AM
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I'm happy with my results!! I think you'll be too....

http://www.youtube.com/watch?v=36zl-JbYoXg
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Old Jan 17, 2010 | 04:32 PM
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I have to agree about getting an H.... I don't know how much money you are willing to spend but I just had my Kooks LT + Catted H and it is AWESOME... Even my wife was like "I Love how Throaty it sounds", and thats a girl saying that!!!
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Old Mar 21, 2010 | 09:38 AM
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Here's my Kooks 1 3/4" LT's with 3" catted H mid-pipe and FRPP stinger mufflers. It's nice and subdued when driving normally, real deep, and opens up nicely under hard acceleration.

audio: http://www.youtube.com/watch?v=-ZqFO7wFlFs

video: http://www.youtube.com/watch?v=GgoRScPX9QE

The video is in car and the audio was taken with a mic on my laptop for cold startup, some revs and a takeoff.
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Old Mar 22, 2010 | 10:15 AM
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Originally Posted by Dysan
Here's my Kooks 1 3/4" LT's with 3" catted H mid-pipe and FRPP stinger mufflers. It's nice and subdued when driving normally, real deep, and opens up nicely under hard acceleration.

audio: http://www.youtube.com/watch?v=-ZqFO7wFlFs

video: http://www.youtube.com/watch?v=GgoRScPX9QE

The video is in car and the audio was taken with a mic on my laptop for cold startup, some revs and a takeoff.

Holy cripes on toast, your car sounds great! Nice videos, thanks for taking the time to do them well and posting them.
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Old Mar 22, 2010 | 03:41 PM
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Sure thing. I will probably try to take better in-car video during the day when I eventually make up a mount for my camcorder.

Thanks for the compliment. I'm extremely happy with it. I was worried it would be loud with my FRPP stinger mufflers but it doesn't seem to be any louder when driving normally than it was with the stock manifolds and stock catted h-pipe. It's definitely louder under hard acceleration though.
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Old Mar 22, 2010 | 10:43 PM
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Stingers would wake her up. My Lt's off road x and stingers are loud as hell.
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Old Mar 22, 2010 | 10:53 PM
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Kooks LT's, catted X, and Stingers here. No complaints. I wouldn't change a thing. When you open her up though, she sounds wicked as hell.

http://www.youtube.com/watch?v=Ond9RCDMhVM

http://www.youtube.com/watch?v=E8vUsee8ecY

I need to make some newer vids.

Last edited by 2k7gtcs; Mar 22, 2010 at 10:57 PM.
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Old Mar 25, 2010 | 06:49 AM
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Originally Posted by MaverickMLFD371
everyone else liked the sound, LOL including the cops
Please don't take it the wrong way dude...everybody has different tastes. It's just too raspy and loud for me. When you revved it on Main St after the car show my ears were ringing for 10-15 minutes afterwards. It's also possible that your whipple is changing the sound as well compared to how it would sound for someone with a N/A engine.
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