4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

Under my car

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Old 10-12-2006, 09:27 PM
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chris01gt
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Default Under my car

Well, to find out exactly what kind of exhaust the previous ower had put on my stang, I finally got a chance to look under there.



Definatly an flowmasters and an aftermarket H pipe, don't know the manufaturer. I guess my question is two of my cats are taken off and I was wondering if I will pass MO emissions. No comments on my artistic talent.
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Old 10-12-2006, 09:30 PM
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mvr
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Default RE: Under my car

thats a cute picture lol

kinda looks like a cated h pipe and a catback with mufflers is what i get from that lovely image you drew, but if you got real pics with a digital camera or something it would be ALOT easier to tell what it is.


quick bit of info:
x-pipes looks like a X
h-pipes look like a H
its pretty self explanitory.



edit:: if you have cats you should be able to pass emissions without problems.
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Old 10-12-2006, 09:30 PM
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JJ03MustangGT
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Default RE: Under my car

looks like and h pipe and maybe 2 chamber mufflers
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Old 10-12-2006, 09:32 PM
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JJ03MustangGT
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Default RE: Under my car

cut those cats off, itll sound a hell of a lot better
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Old 10-12-2006, 09:39 PM
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chris01gt
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cut those cats off, itll sound a hell of a lot better
Well, I'd definatly like to, but once again I live in MO and I need to pass emissions. However, I could get the two year and THEN cut the cats off seince I'm taking it up there tomarro, hehe. My buddy (he seems to know alot about cars) said that removing all the cats is bad because there is no back pressure and it could burn up some thing-a-majig. Is it bad in any way for your car at all???

Sorry for sounding like a complete noob.
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Old 10-12-2006, 10:09 PM
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04BlueGT
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Default RE: Under my car

ORIGINAL: chris01gt

cut those cats off, itll sound a hell of a lot better
That is an opinion. It will, most likely, sound raspy. It really depends on what you want for sound.

Well, I'd definatly like to, but once again I live in MO and I need to pass emissions. However, I could get the two year and THEN cut the cats off seince I'm taking it up there tomarro, hehe. My buddy (he seems to know alot about cars) said that removing all the cats is bad because there is no back pressure and it could burn up some thing-a-majig. Is it bad in any way for your car at all???

Sorry for sounding like a complete noob.
This is over simplified, but here goes.

Forget about back pressure. The goal is to get exhaust gases out of the motor as quickly as possible. Too large/unrestricted of a pipe and the gases cool too quickly and slow down before they exit the exhaust, producing back pressure. You have 2.5 inch pipes with cats. You're fine.

My guess, based on your drawing, is that you already have an aftermarket H pipe with hi-flow cats. Removing them will make your car louder, but that's about it. You will not see a benefit by removing them. If you decide to add headers, then you'll see a little more from an off road pipe, but the difference anymore is negligable.
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Old 10-12-2006, 10:13 PM
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ripper
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I have prochamber ehaust and just passed emission inspection today (no cats) how the hell did that happen? lol I was ready fer the red sticker.
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