////Too many cats on a 98 GTplzz help!!\\\\

[Madinker]

Hello all.
I have a 98 GT, earlyer on i put on single chamber flowmasters and i am anything but impressed with the sound, problem is that my GT has 6 catilatic converters stock. the shops i go to say that there is no way to take even just 2 of them off, and there arnt any better ones to replace all 6, which i dont want to just replace with 6 more.. i want to be legal and have a throghty sounding stang....What do i do???????
---------------==madinker==-------------

[silverstangs]

Order an X-pipe with cats and have two more added to them. Issue solved...
look at Magnaflow.

[Madinker]

Ok , but will that be legal and or pass smog? i want louder ad i was told the x-pipe is better preformance but quiets the car a tad bit more... but ur telling me to just run 4 cats and the x-pipe right? so i guess what i just wanna know is if its legal..??
----------------==madinker==----------------

[BigDanTheMan]

you should still pass smog and get a nice throaty sound out of the after market x-pipes, but it won't be much different than what it is now and it certainly won't be much louder. i don't think that the cats have much by the way of noise suppression.

[silverstangs]

Originally Posted by Madinker

Ok , but will that be legal and or pass smog? i want louder ad i was told the x-pipe is better preformance but quiets the car a tad bit more... but ur telling me to just run 4 cats and the x-pipe right? so i guess what i just wanna know is if its legal..??
----------------==madinker==----------------

Run forur cats, it does not matter of it is H or X, most common aftermarket is X. I prefer H pipes.

4 Cats IS louder than 6 cats, and 2 cats IS louder than 4 cats. I personally have tested that theory and have seen 22decible increase in sound going from 6 cats to 2 cats. and it was about 10db going from 6 to 4 cats.

[BigDanTheMan]

Originally Posted by silverstangs

4 Cats IS louder than 6 cats, and 2 cats IS louder than 4 cats. I personally have tested that theory and have seen 22decible increase in sound going from 6 cats to 2 cats. and it was about 10db going from 6 to 4 cats.

that doesn't sound right. a 22db increase is very significant. you know this generation of mustang infinitely better than i do, but a 32 bd increase is like taking off your mufflers all together. but if you tested it, you tested it - i'm not calling you out - i am just very surprised.

[silverstangs]

Originally Posted by BigDanTheMan

that doesn't sound right. a 22db increase is very significant. you know this generation of mustang infinitely better than i do, but a 32 bd increase is like taking off your mufflers all together. but if you tested it, you tested it - i'm not calling you out - i am just very surprised.

uuhh that was tested without mufflers, we were testing how much the cats take down the sound...

[BigDanTheMan]

well there ya go

[Madinker]

Ok thanx guys.. but still i know for a fact here in california you can not take a cat off with out having to switch ou the OBD2 sensor to a new one that changes the exhaust reading so the engine light stays off... and with out it , it wont pass smog.. OK so once again which out of that is legal??? i know the H-pipe is "off road" use only.. says it all over the sites even.. so whats legal??? keep in mind i want a bit louder and throughty-er .
-------------------==madinker==------------------

[silverstangs]

Originally Posted by Madinker

Ok thanx guys.. but still i know for a fact here in california you can not take a cat off with out having to switch ou the OBD2 sensor to a new one that changes the exhaust reading so the engine light stays off... and with out it , it wont pass smog.. OK so once again which out of that is legal??? i know the H-pipe is "off road" use only.. says it all over the sites even.. so whats legal??? keep in mind i want a bit louder and throughty-er .
-------------------==madinker==------------------

EFFECTIVE BY FEDERAL POLICY,
AUGUST 5, 1986

The following is the Federal Environmental Protection Agency (EPA) and the California Air Resources Board (CARB) regulations * for the proper installation of replacement catalytic converters:

1. Replacement catalytic converters may be installed only in situations as defined in the CONDITIONS FOR REPLACEMENT.

2. Replacement catalytic converters must be installed in the same location as the original converter.

3. Replacement catalytic converters must be the same type of converter as the original converter (i.e., oxidation, three-way, or three-way-plus oxidation);

4. Replacement catalytic converters must be the proper converter for the vehicle application as determined and specified by the manufacturer;

5. Replacement catalytic converters must be connected properly to any existing air injection or temperature or oxygen sensing components on the vehicle.

6. Replacement catalytic converters must be installed with all the other required converters for the particular application if more than one converter was installed originally by the vehicle manufacturer; or in the case of new aftermarket converters, if more than one converter was specified by the converter manufacturer;

7. Installers must complete the INSTALLER’S WARRANTY SHEET, and sign it, as also the vehicle owner.

* VIOLATIONS of one or more of these installation requirements could result in the installer being liable for a penalty of up to $25,000 for each violation, under provisions set forth in the EPA tampering prohibition law specified in Section 203 of the Clean Air Act, 42 US Code, Section 7522, amended in 1990, and under the CARB rules and regulations pertaining to aftermarket catalytic converters.



To any person repairing or installing any exhaust system, the Clean Air Act, as amended 1990, requires that:

AFTERMARKET CATALYTIC CONVERTERS MAY ONLY BE INSTALLED IN THE FOLLOWING SITUATIONS:

1. If the vehicle is missing a converter; *

2. If a State or local inspection program has determined that the existing converter has been lead-poisoned, damaged, or otherwise rendered ineffective and needs replacement. Retain a copy of this statement from any government inspection or enforcement agency for your records;

3. If the vehicle is over five (5) years old, or has more than 50,000 miles, or eight (8) years old or 80,000 miles for 1995 and newer model vehicles, AND a legitimate need for replacement has been established and documented.* This situation normally would include only plugged converters or those damaged to the point where unrepairable exhaust leaks are present. See * DOCUMENTATION REQUIREMENTS below.

Catalytic converters are emission control devices which are designed to last the life of the vehicle and do not normally require replacement. Furthermore, if the vehicle is properly used and maintained, original converters are covered by the emissions control warranty for 5 years/50,000 miles, or 8 years/80,000 miles for 1995 and newer models. Federal law prohibits any person from replacing these devices except under limited circumstances (listed above).


* DOCUMENTATION REQUIREMENTS *

In order to establish and document that the circumstances permitting replacement of an original or missing converter with an aftermarket converter meeting the required performance criteria exist, the Installer must complete the INSTALLER’S WARRANTY SHEET. The installer and the vehicle owner must sign the statement establishing and documenting catalytic converter replacement justification.

- A copy of the completed warranty sheet must be attached to the invoice and retained by the installer for six (6) months.

- Also, the replaced converter(s), if any, must be retained by the installer for at least fifteen (15) days from the date of installation.

- The installer must install each replacement catalytic converter according to EPA policy, as described in the INSTALLATION REQUIREMENTS

[Madinker]

HOLLY CRAP!!!!! umm that just scared the heck out of me ever wanting to take any of my 6 damn cats off.... this SUX!!! what the heck do i do?? just stick with six?
----------------------==madinker==------------------

[silverstangs]

Originally Posted by Madinker

HOLLY CRAP!!!!! umm that just scared the heck out of me ever wanting to take any of my 6 damn cats off.... this SUX!!! what the heck do i do?? just stick with six?
----------------------==madinker==------------------

LOL


Find someone with a stock 4 cat H-pipe... and trade..

[Los]

I have no cats. The emissions be smelly!

[silverstangs]

Originally Posted by Los

I have no cats. The emissions be smelly!

I have cats... 4 of them...

[yellow93lx]

I just had to put Cats on my car. I bough it with a H pipe and not cats and in Memphis they do the tail pipe inspection and it just would not pass. I was able to get a muffler shop to just cut a section out of the H-pipe and install the hi-flow cats. Passed with no problems after that. I lived in Cali for a few years and remember how bad they were so I can fell for you.