2003 GT is too damn quiet! - Mustang Evolution

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Old 07-05-2015, 02:46 PM   #1
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2003 GT is too damn quiet!

I have a 2003 GT and I purchased the American Thunder system from AM last year. It's too damn quiet for my liking. Anyway, I'm not sure if I should just purchase a different catback exhaust system, or try adding an aftermarket H/X pipe? I hate the idea of spending another $500+ on a new catback system, but I'm just not sure if an aftermarket X/H pipe will be loud enough? Also, I'm curious if a catted X/H would be much louder than the factory pipe?
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Old 07-05-2015, 02:48 PM   #2
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A cat delete will make it louder.


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Old 07-05-2015, 03:07 PM   #3
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A off road mid pipe will make it alot louder.

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Old 07-05-2015, 03:32 PM   #4
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The off road pipes, either x or h will be a lot louder than the stock mid pipe.

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Old 07-05-2015, 04:05 PM   #5
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The American thunder cat back comes with super 44's...buy some slp loudmouth "mufflers" or some flowmaster super 10's. Alot cheaper.

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Old 07-05-2015, 04:51 PM   #6
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Considering we have emissions here in NH, I'm trying to avoid going catless.
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Old 07-05-2015, 05:01 PM   #7
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Quote:
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The American thunder cat back comes with super 44's...buy some slp loudmouth "mufflers" or some flowmaster super 10's. Alot cheaper.

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I believe it's super 40s not 44s. 44s are a bit louder. Just get and o/r h and it will be pretty loud but not obnoxious loud.


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Old 07-05-2015, 05:06 PM   #8
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I stand corrected brother...you are absolutely right. In any case I changed my super 40's to super 10's, sound much much better. Just wish I could go catless...damned New York state.

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Old 07-05-2015, 05:28 PM   #9
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I stand corrected brother...you are absolutely right. In any case I changed my super 40's to super 10's, sound much much better. Just wish I could go catless...damned New York state.

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After 44s I'm getting some 10s. I have an o/r h


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Old 07-05-2015, 05:38 PM   #10
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Thats gonna sound bad a** with an o/r.

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Old 07-05-2015, 05:43 PM   #11
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Yea specially an h pipe. I've never heard that setup. I can't wait


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Old 07-05-2015, 05:50 PM   #12
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You will have to post a vid.

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Old 07-05-2015, 05:53 PM   #13
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They sell catted mid pipes , either way it will be better than the stock equipment.

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Old 07-05-2015, 06:21 PM   #14
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That is what I am gonna get after I get springs and suspension done.

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Old 07-05-2015, 06:30 PM   #15
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Put slp lm1.

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Old 07-05-2015, 07:03 PM   #16
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UPR catted X is $300, uses super high flow Magnaflow cats, is made in the USA and has amazing ground clearance.

A catted aftermarket pipe will make the car louder but not obnoxiously loud where you are going to piss off neighbors and attract cops.

Only reason at this level to run an O/R pipe is sound. Good aftermarket cats like the Magnaflows do not rob any power and keep you legal. Buddy of mine up north swapped his pipe and the first DAY got pulled over buy a cop and issued a 48hr fix it ticket and a fine.

Also remember, being the loudest does not mean the car sounds good. If I sound like a prick, I'm not trying to be, just making sure you make the right choice for YOU and don't do anything that might cause issues for you in an emissions state.
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Old 07-05-2015, 07:08 PM   #17
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Exhaust cut outs 🙌


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Old 07-05-2015, 07:14 PM   #18
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^ had them, bad decision.


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Old 07-05-2015, 07:15 PM   #19
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Definitely getting a catted mid pipe...gotta get the old girl breathing better, but going with suspension mods first.

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---------- Post added at 12:15 AM ---------- Previous post was at 12:15 AM ----------

Quote:
Originally Posted by scottydsntknow View Post
UPR catted X is $300, uses super high flow Magnaflow cats, is made in the USA and has amazing ground clearance.

A catted aftermarket pipe will make the car louder but not obnoxiously loud where you are going to piss off neighbors and attract cops.

Only reason at this level to run an O/R pipe is sound. Good aftermarket cats like the Magnaflows do not rob any power and keep you legal. Buddy of mine up north swapped his pipe and the first DAY got pulled over buy a cop and issued a 48hr fix it ticket and a fine.

Also remember, being the loudest does not mean the car sounds good. If I sound like a prick, I'm not trying to be, just making sure you make the right choice for YOU and don't do anything that might cause issues for you in an emissions state.


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Old 07-05-2015, 07:28 PM   #20
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2v + O/R H + Super 44s = sex
2v + O/R X + SLP = annoying trash
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Old 07-05-2015, 07:32 PM   #21
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Here is my 2004 GT with Pypes off-road H pipe, Flowmaster Super 10 Series Mufflers, and 2.5" tailpipes...



I had Pypes M80 mufflers, and it was even louder...

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Old 07-05-2015, 07:34 PM   #22
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2v + O/R H + Super 44s = sex
2v + O/R X + SLP = annoying trash
They do sound good.

Another real good combo is an X pipe with a straight through muffler like a Bassanni/Magnaflow/Dynomax Ultra. The Ultra is my go-to muffler if I am starting with a stock setup.
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Old 07-05-2015, 09:27 PM   #23
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I was thinking about replacing the Flowmaster catback with the Loudmouth 1. Seems like it gets a lot of hate though.
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Old 07-05-2015, 09:28 PM   #24
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They're basically resonators and super obnoxious. I mean if you are going for max noise yeah but they sound like *** IMO. Just a lot of noise, no real... muscle car sound.
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Old 07-05-2015, 11:12 PM   #25
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Unless the car is a top fuel dragster then the loudest humanly possible exhaust usually sounds like butt wipe.


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Old 07-05-2015, 11:18 PM   #26
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Unless the car is a top fuel dragster then the loudest humanly possible exhaust usually sounds like butt wipe.


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I wanted to make a sign that said this and put it in front of the house I used to live in for the couple of jackasses who ran them and did blasts up the street at 2AM. Nobody works weekends or has kids or anything...
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Old 07-05-2015, 11:21 PM   #27
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Quote:
Originally Posted by Soccerluvr4 View Post
2v + O/R H + Super 44s = sex
2v + O/R X + SLP = annoying trash

Can't wait to get louder flow master mufflers with the h


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Old 07-06-2015, 04:41 PM   #28
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With a prochamber the SLP Lm1 sound good.


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Old 07-07-2015, 02:39 AM   #29
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If you want a LOUD but good sounding setup i would recommend getting longtube headers with a offroad x pipe and borla atak stainless steel cat back. Its so freaking loud but it still has such a unique tone to it people tell me all the time that they have never heard anything like it. In the video its kinda hard to hear but in real life it sounds so freaking good. The guy that recorded the fly by video said that i almost blew his ear drums haha, so yeah this is one of the few LOUD exhaust setups that still keeps a distinctive good sounding tone and not just random noise.

http://youtu.be/_eFUU1uqYsE

http://youtu.be/E_9MORw0SEg


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Old 07-08-2015, 02:20 AM   #30
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If you want a LOUD but good sounding setup i would recommend getting longtube headers with a offroad x pipe and borla atak stainless steel cat back. Its so freaking loud but it still has such a unique tone to it people tell me all the time that they have never heard anything like it. In the video its kinda hard to hear but in real life it sounds so freaking good. The guy that recorded the fly by video said that i almost blew his ear drums haha, so yeah this is one of the few LOUD exhaust setups that still keeps a distinctive good sounding tone and not just random noise.

http://youtu.be/_eFUU1uqYsE

http://youtu.be/E_9MORw0SEg


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That does sound really good. Good job!

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