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Old 02-01-2015, 12:34 PM   #1
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Removing cats off catted x pipe

I have a magnaflow high flow catted x pipe with flow master super 44s and while it sounds good its definetly not loud enough. Honestly it feels like everyday the 44s get quieter and quieter. I like the note they make but I've been thinking of removing the cats off to hopefully make it louder.

My question is will it be noticeably louder? Will it sound good. Does the piping that will be replacing the cats need to be welded or can it be clamped?

Help guys . regretting my choice of getting the 44s


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Old 02-01-2015, 04:19 PM   #2
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Like in previous thread, yes it will be louder. Anything offroad will be louder than catted.

Here's my car with off road x pipe with flowmasters

2000 Mustang GT o/r x pipe/flowmasters 40s exhaust: http://youtu.be/k_-8BUb-A3o

And here's my car with catted x pipe with flow masters.

2000 Mustang GT Magnaflow X Pipe flowmaster 40s: http://youtu.be/7BzcSJGISks

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Old 02-01-2015, 04:47 PM   #3
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Removing cats off catted x pipe

You have a magnaflow x pipe as well?

And my question was is it noticeably louder or just marginally


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Old 02-01-2015, 04:51 PM   #4
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I had magnaflow catted. Switched to upr x pipe and yes. Its noticeable louder no doubt.

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Old 02-01-2015, 05:03 PM   #5
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Would I be able to remove the cats of my x pipe?


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Old 02-01-2015, 10:28 PM   #6
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Yes, you can if you know how to wield or know somebody that will do it for you. It's illegal to remove the cats so most shops will not do it.

Here's my X pipe
99-03 Ford Mustang Off Road X Pipe | UPR Products

You'll need 02 MIL so the check engine light will stay off or a Tuner.

I bought the UPR so save the hassle of finding a shop because nobody around here would do it. And sold the Magnaflow Catted X Pipe I had for a little over $200. So Pretty much got my upr for free with cash left over.
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Old 02-02-2015, 09:31 AM   #7
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Louder does not equal better. And you are hacking up a really nice REALLY expensive 409 stainless steel mid pipe in that Magnaflow. I'd leave it alone and go for mods that will actually help the car back up its sound vs just making it another loud 2V Mustang that runs 14s.


You will gain no power by removing high flow cats off an NA 2V car either if you are thinking you'll pick up some HP. A good high flow aftermarket cat like a Magnaflow or a Walker is not going to be any sort of restrictive at all until past the 500-600hp range and even then...
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Old 02-02-2015, 10:31 AM   #8
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Sounds like you have a good set up as far as the X-Pipe & Hi-Flow Cats. Are you using 2 or 4 Cats ? I always just use 2 & do away with the other 2. 2 Cats = Louder
What size piping are you using ??? 2" or 2.5" ??? Bigger Pipe = Louder
Muffler Choice = Louder ( I personally prefer Glass Packs as I like an Old School Hot Rod Sound & I love the way it Crackles when I rev the engine ) I usually Use Hush Thrush / Cherry Bombs.
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Old 02-02-2015, 12:11 PM   #9
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Quote:
Originally Posted by scottydsntknow View Post
Louder does not equal better. And you are hacking up a really nice REALLY expensive 409 stainless steel mid pipe in that Magnaflow. I'd leave it alone and go for mods that will actually help the car back up its sound vs just making it another loud 2V Mustang that runs 14s.


You will gain no power by removing high flow cats off an NA 2V car either if you are thinking you'll pick up some HP. A good high flow aftermarket cat like a Magnaflow or a Walker is not going to be any sort of restrictive at all until past the 500-600hp range and even then...

Yea I have though of the fact about ruining a perfect x pipe and what it would bring later. But really I would just be doing it for the sound not hp gains.


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Old 02-02-2015, 12:14 PM   #10
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Removing cats off catted x pipe

Quote:
Originally Posted by Hellish Horse View Post
Sounds like you have a good set up as far as the X-Pipe & Hi-Flow Cats. Are you using 2 or 4 Cats ? I always just use 2 & do away with the other 2. 2 Cats = Louder
What size piping are you using ??? 2" or 2.5" ??? Bigger Pipe = Louder
Muffler Choice = Louder ( I personally prefer Glass Packs as I like an Old School Hot Rod Sound & I love the way it Crackles when I rev the engine ) I usually Use Hush Thrush / Cherry Bombs.

2 cats. The x pipe I believe is 2.5. Mufflers are 2.5 as well the rest of the piping is stock. I was under the impression that the piping size going from 2.25 to 2.5 wouldn't make much of a difference when it comes to sound?


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Old 02-02-2015, 12:21 PM   #11
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My 04 had 2" pipe originally. I changed it to 2.5" & it was a pretty big difference.
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Old 02-02-2015, 12:25 PM   #12
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Removing cats off catted x pipe

Yea I'm not how much it is. But it's stock. This is mine and it feels like it's getting quieter by the day. http://youtu.be/Jb8ASBXTjlA


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Old 02-02-2015, 12:54 PM   #13
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Hi flow cats improve sound and performance. Dyno tunes can maximize either set-up.
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Old 02-02-2015, 01:53 PM   #14
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I just want a little louder. Can custom piping for bigger diameter help with this?


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Old 02-02-2015, 03:25 PM   #15
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No, 2.5 is the max for n/a.

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Old 02-02-2015, 03:29 PM   #16
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So stock piping is 2.5?


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Old 02-02-2015, 03:43 PM   #17
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I believe stock is 2.25 but the most you want to go is 2.5

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Old 02-02-2015, 03:47 PM   #18
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Quote:
Originally Posted by scottydsntknow View Post
Louder does not equal better. And you are hacking up a really nice REALLY expensive 409 stainless steel mid pipe in that Magnaflow. I'd leave it alone and go for mods that will actually help the car back up its sound vs just making it another loud 2V Mustang that runs 14s.


You will gain no power by removing high flow cats off an NA 2V car either if you are thinking you'll pick up some HP. A good high flow aftermarket cat like a Magnaflow or a Walker is not going to be any sort of restrictive at all until past the 500-600hp range and even then...
Yeah, you can try going catless but it's not for everyone. I went catless, added resonators, and most likely will go back to cats, but since I hacked up my factory catback I'm going to have to redo the whole system. No regrets though, had to give it a try.
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Old 02-02-2015, 06:53 PM   #19
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Wait I thought you said you had a magnaflow h pipe... May have read that wrong. If you have a stock mid pipe then just get an off-road pipe and call it good. Don't cut up the stock pipe, it's a waste of time unless you are totally diy.

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Old 02-02-2015, 06:55 PM   #20
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Quote:
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Wait I thought you said you had a magnaflow h pipe... May have read that wrong. If you have a stock mid pipe then just get an off-road pipe and call it good. Don't cut up the stock pipe, it's a waste of time unless you are totally diy.

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Magnaflow x pipe. But it's too quiet. But the rest of the piping after the mufflers are the stock 2 in piping. I didn't know the diameter contributed that much to the sound. I might just get and o/r h pipe for $160 and call it a day


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Old 02-02-2015, 10:36 PM   #21
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Definitely just get a new midpipe
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Old 02-03-2015, 08:53 AM   #22
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Magnaflow x pipe. But it's too quiet. But the rest of the piping after the mufflers are the stock 2 in piping. I didn't know the diameter contributed that much to the sound. I might just get and o/r h pipe for $160 and call it a day


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Don't hack up that pipe or get a new one then, get a real catback in there. A Magnaflow X pipe is going to be ridiculously good quality 409 stainless with really high flow cats. You'll be downgrading in quality with pretty much anything you go with unless its another Magnaflow but offroad.

Also, too loud and you will attract law enforcement and piss off ppl in the neighborhood. There is a happy medium between stock and "omfg loud". But if you want louder and keep good pipe you have, look into the SLP catback. They are yoga balls loud with an OR pipe but with a catted pipe they'll still be pretty loud but not completely obnoxious.
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