4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

Need Cats

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Old Feb 15, 2008 | 05:55 PM
  #1  
rezarxt's Avatar
rezarxt
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Default Need Cats

Yeah I need some cats for my exhaust. Its a 2000 GT with flowmaster exhaust (off road catless). I have the stock cats but I really love the loud sound so I dont want to put them back on. Can you guys reccomend any highflow/performance cats for me?

It wont pass inspection right now in VA so thats why i need them. It came from AZ. Thanks
Old Feb 15, 2008 | 06:03 PM
  #2  
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usermst9673
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Default RE: Need Cats

any cat even high flow will be quieter than no cats, but i would go with magnaflow high flow cats. Or do you just need them for visual to pass inspection? Just get some cats and gut them. They wont know the difference.
Old Feb 15, 2008 | 07:03 PM
  #3  
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Default RE: Need Cats

^^ +1. just gut them..thats what i did. wont u have to buy a new mid pipe tho? not just the cats
Old Feb 15, 2008 | 07:22 PM
  #4  
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Default RE: Need Cats

gut your stock ones and have them welded to your h pipe.
Old Feb 15, 2008 | 07:47 PM
  #5  
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Default RE: Need Cats

I'd go with magnaflows. They are not too cheap though
Old Feb 15, 2008 | 08:11 PM
  #6  
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rezarxt
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Default RE: Need Cats

Okay ive decided to gut them. I have an xpipe btw not an hpipe. That wont matter will it?

And as far as gutting them, should I do it or will the shop do it?Ican just stick a rod through it right and make a hole or do i need to cuta hole in the side and cut out a holethrough the filter andthen have it rewelded closed again. It isnt illegal is it since there are no emissions testing in VA? (just learned that)

Any help/specifics/directions would be appreciated since I just bought the car and my knowledge is limited.

Old Feb 15, 2008 | 10:32 PM
  #7  
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Default RE: Need Cats

I think it is still illegal, they just dont test for it. Some shops are touchy about it because it is a hefty fine if they get caught. It being an xpipe doesnt matter.
Old Feb 15, 2008 | 10:51 PM
  #8  
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99BlackPonyGT
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Default RE: Need Cats

if you dont get emission tested, why do you need them again?
Old Feb 15, 2008 | 11:22 PM
  #9  
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livefast1
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Default RE: Need Cats

there is a visual inspection for cats during the inspection usually. you are gonna wanna most likely cut the cats into 2 halves and have them welded over the pipe. they will be empty and will just weld over your x pipe.
Old Feb 16, 2008 | 03:54 PM
  #10  
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Lefty
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From: MASS
Default RE: Need Cats

i would just put the stock ones on for inspection and then take them off after you get your sticker. its a pain but worth it for the sound i think.
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