GT Performance Mods 2005+ Mustang GT Performance and Technical Information

Ready to Mod my Exhaust

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Old 4/17/05, 09:58 AM
  #1  
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OK, I've looked through the last 10 pages and have found a lot of people happy w/ the SLP Loudmouth exhaust. I don't want to spend much, that's why I'm leaning toward the SLP system. I do most of my driving 75-80 mph... how's that drone at those speeds? I've heard that 70mph is were the 2100rpm drone sets in.

I'm looking to gain a little sound, but not be annoyed.
I want a better looking pipe sticking out the rear.
I want to loose some weight.
I don't want to spend more than $300.

Is SLP my answer or should I leave the stock exhaust, or go with something else altogether?

Anyone want to sell their Loudmouths or other exhaust that might work for me?

TIA! :worship:
Old 4/17/05, 10:16 AM
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The SLP's are loud, but sound soo freaking good. At freeway speeds you don't notice them much, only if your climbing a hill or giving it throttle, even at 2100 rpm. The resonation only seems to happen under acceleration between 1900 and 2100, if your just holding constant speed it's not all that noticable. I will say this, my fuel miliage has gotten worse since I put them on because I can't stay out of the throttle, I keep the windows down and radio off, just LOVE the sound of my car now, cant get enough.

The tips look great too, if you do a search you might find my thread where I posted the photos. I think you will love them.
Old 4/17/05, 12:14 PM
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Originally posted by nynvolt@April 17, 2005, 9:19 AM
The SLP's are loud, but sound soo freaking good. At freeway speeds you don't notice them much, only if your climbing a hill or giving it throttle, even at 2100 rpm. The resonation only seems to happen under acceleration between 1900 and 2100, if your just holding constant speed it's not all that noticable. I will say this, my fuel miliage has gotten worse since I put them on because I can't stay out of the throttle, I keep the windows down and radio off, just LOVE the sound of my car now, cant get enough.

The tips look great too, if you do a search you might find my thread where I posted the photos. I think you will love them.
He is right on about the drone. You only notice it if you really gas it @ about 2100rpms, if you are cruising, it is non existant. I recommend the SLP 100% it is the best money I have spent on this car. Worth every penny.
Old 4/17/05, 12:29 PM
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try the flowmaster american thunder kit. i paid 269.00 deliverd.
Old 4/17/05, 12:37 PM
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I lust for a M24
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Originally posted by nynvolt@April 17, 2005, 11:19 AM
The SLP's are loud, but sound soo freaking good. At freeway speeds you don't notice them much, only if your climbing a hill or giving it throttle, even at 2100 rpm. The resonation only seems to happen under acceleration between 1900 and 2100, if your just holding constant speed it's not all that noticable. I will say this, my fuel miliage has gotten worse since I put them on because I can't stay out of the throttle, I keep the windows down and radio off, just LOVE the sound of my car now, cant get enough.

The tips look great too, if you do a search you might find my thread where I posted the photos. I think you will love them.
I saw that. It's one of the reasons I'm looking at going w/ them myself.
Old 4/17/05, 12:40 PM
  #6  
I lust for a M24
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Originally posted by tx2005gt@April 17, 2005, 1:32 PM
try the flowmaster american thunder kit. i paid 269.00 deliverd.
Got any info or pics? How does it compare to stock?
Any hp gain?
Weight reductin?
Where did you purchase it from?
How's the drone between 75 and 80mph?
Old 4/17/05, 07:03 PM
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Originally posted by 05GT-O.C.D.@April 17, 2005, 10:01 AM
OK, I've looked through the last 10 pages and have found a lot of people happy w/ the SLP Loudmouth exhaust. I don't want to spend much, that's why I'm leaning toward the SLP system. I do most of my driving 75-80 mph... how's that drone at those speeds? I've heard that 70mph is were the 2100rpm drone sets in.

I'm looking to gain a little sound, but not be annoyed.
I want a better looking pipe sticking out the rear.
I want to loose some weight.
I don't want to spend more than $300.

Is SLP my answer or should I leave the stock exhaust, or go with something else altogether?

Anyone want to sell their Loudmouths or other exhaust that might work for me?

TIA! :worship:

iv'e got the bassani axle back , They sound incredible!!
Old 4/17/05, 09:13 PM
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I have Magnaflows catbacks... I ditched Magnaflows and went with Magnapacks. They are nice and loud. A little drone around 1900 rpms. You can definitely hear me coming down the street.






Cheers_Jay
Old 4/17/05, 10:00 PM
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Originally posted by j-stang@April 17, 2005, 8:16 PM
You can definitely hear me coming down the street.

not as much as you can hear me!!
Old 4/17/05, 10:52 PM
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Meter? :clown:
Old 4/17/05, 11:44 PM
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Originally posted by 05GT-O.C.D.@April 17, 2005, 10:01 AM
OK, I've looked through the last 10 pages and have found a lot of people happy w/ the SLP Loudmouth exhaust. I don't want to spend much, that's why I'm leaning toward the SLP system. I do most of my driving 75-80 mph... how's that drone at those speeds? I've heard that 70mph is were the 2100rpm drone sets in.

I'm looking to gain a little sound, but not be annoyed.
I want a better looking pipe sticking out the rear.
I want to loose some weight.
I don't want to spend more than $300.

Is SLP my answer or should I leave the stock exhaust, or go with something else altogether?

Anyone want to sell their Loudmouths or other exhaust that might work for me?

TIA! :worship:
Ok love the look at the rear and the sound of the slp.Very happy
Old 4/18/05, 09:00 AM
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Got any info or pics? How does it compare to stock?
Any hp gain?
Weight reductin?
Where did you purchase it from?
How's the drone between 75 and 80mph?

1. i do not think i got any power gain but it sounds much better
2. the weight is a few pounds less
3. 21st CENTURY EXHAUST
313 N.E. 3RD STREET
DELRAY BEACH, FL 33444
800 276-6399
4. the only time you get a drone is when you are going to low of rpm for the gear you are in. if you down shift it is gone. at 75-80 there is none.
Old 4/18/05, 09:04 AM
  #13  
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here are some pictures
Old 4/18/05, 10:03 AM
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Mine at least sounded faster after I put the loudmouth kit on . I have yet to see a dyno sheet after someone installed these. I saw a post awhile back that someone claimed they gained 18 rwhp after installing this kit, I personally think it's BS though. But you have to wonder, a straight flow versus chambered has to do some good
Old 4/18/05, 10:08 AM
  #15  
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Originally posted by The Lyin' King@April 17, 2005, 9:55 PM
Meter? :clown:
I will start digging through the garage as soon as I get home
Old 4/18/05, 12:31 PM
  #16  
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Originally posted by emperorjordan+April 18, 2005, 9:11 AM--><div class='quotetop'>QUOTE(emperorjordan @ April 18, 2005, 9:11 AM)</div><div class='quotemain'><!--QuoteBegin-The Lyin' King@April 17, 2005, 9:55 PM
Meter? :clown:
I will start digging through the garage as soon as I get home
[/b][/quote]

:worship:
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