2.0L LSJ Performance Tech 205hp Supercharged SS tuner version. 200 lb-ft of torque.
View Poll Results: Cat or No Cat
Catted downpipe
51.61%
Catless downpipe
48.39%
Voters: 31. You may not vote on this poll

Cat or Catless...

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Old Jun 23, 2011 | 12:01 PM
  #1  
Tstonee's Avatar
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From: Dayton, Ohio
Cat or Catless...

I'm going to be ordering a downpipe probably later today, if not, tomorrow...

I was told to do both, get a cat and get rid of it..

I have stock everything when it comes to exhaust.. except a flowmaster muffler..
That thing already sounds like total ass once I hit about 3k..

I know the catless will be louder (still not sure how much?) and i'm already loud w/ that muffler..

What're some of the advantages and disadvantages of each..

Thanks.



Edit: Mods are 2.8, 60's, and stage 3 h/e
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Old Jun 23, 2011 | 12:03 PM
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From: MA
get a high-flow cat
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Old Jun 23, 2011 | 12:22 PM
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advantage to catless is slight hp gain. disadvantage is exhaust sounds raspy(some people like it, most dont) and that youd need to get someone with hptuners to delete the cat from your system. also wont pass inspection catless.


advantage to cat is way less rasp sound and not having to use hptuners to get rid of it in your system. disadvantage is slightly less hp gains. cat will pass inspection even if its a high flow cat.
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Old Jun 23, 2011 | 12:26 PM
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I run the 3" vibrant High Flow at downpipe and love it! Sounds good and im legal
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Old Jun 23, 2011 | 12:27 PM
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im catless and have ZERO rasp! the secret is to get a 20+inch glass pack to put after the downpipe.. then u have 0 rasp!
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Old Jun 23, 2011 | 12:31 PM
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From: Houston, Tx
Originally Posted by CobaltVenomSS
im catless and have ZERO rasp! the secret is to get a 20+inch glass pack to put after the downpipe.. then u have 0 rasp!
do you have any video clips of your exhaust. ive been wanting to see what glass packs sound like with a catless 3" dp.
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Old Jun 23, 2011 | 12:31 PM
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From: NEPA
Originally Posted by CobaltVenomSS
im catless and have ZERO rasp! the secret is to get a 20+inch glass pack to put after the downpipe.. then u have 0 rasp!
I was catless for a while to, and had zero rasp. My secret was my Corsa Catback. I just got sick of the smell. The exhaust smelled like my pop's 65' GTO.

I also passed inspection, but PA does not use tailpipe sniffers so can't say this would be true everywhere.
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Old Jun 23, 2011 | 12:32 PM
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yea but its on facebook my friend recorded it

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u prolly cant see it
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Old Jun 23, 2011 | 12:34 PM
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From: Houston, Tx
Originally Posted by CobaltVenomSS
yea but its on facebook my friend recorded it

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u prolly cant see it
nope. wont let me see it.
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Old Jun 23, 2011 | 12:35 PM
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im putting on my new catless downpipe friday so ill take videos then
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Old Jun 23, 2011 | 12:38 PM
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I'm Currently running the ZZP 3" catless DP w/ stock catback. raspless until recently, think my resonator and/or muffler has come apart. My reasoning was the slight hp gain, and I don't want to keep going through cats. I had already went through 2 on my stock setup..
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Old Jun 23, 2011 | 12:40 PM
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i already have the catless dp. now im just waitin for Brad at Bad Mab to ship me the header. im at a stage of not knowing what im going to do as far as the exhaust goes. i hope it sounds good with glass packs cuz i can get a really good deal on 1.
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Old Jun 23, 2011 | 12:55 PM
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From: Tyler,Texas
Originally Posted by SatanzSS/SC
i already have the catless dp. now im just waitin for Brad at Bad Mab to ship me the header. im at a stage of not knowing what im going to do as far as the exhaust goes. i hope it sounds good with glass packs cuz i can get a really good deal on 1.
glasspacks FTW!!
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Old Jun 23, 2011 | 01:42 PM
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why dont you try using the search button and making up your own mind
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Old Jun 23, 2011 | 02:13 PM
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Originally Posted by mrbelvedere
why dont you try using the search button and making up your own mind
ooooooooooooo buuuuuuuuuurrrrrrrrrrnnnnnnnnnnnnnn
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Old Jun 25, 2011 | 08:11 PM
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The only reason I would want to go catless is to be able to make flames out the back )))
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Old Jun 25, 2011 | 08:55 PM
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Originally Posted by CobaltVenomSS
im catless and have ZERO rasp! the secret is to get a 20+inch glass pack to put after the downpipe.. then u have 0 rasp!
Don't glasspacks blow out after awhile? How long have you been running the same one?
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Old Jun 26, 2011 | 12:03 AM
  #18  
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I wish













i] had my cat back. car sounds like crap...
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Old Jun 26, 2011 | 01:39 AM
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Originally Posted by SatanzSS/SC
advantage to catless is slight hp gain. disadvantage is exhaust sounds raspy(some people like it, most dont) and that youd need to get someone with hptuners to delete the cat from your system. also wont pass inspection catless.


advantage to cat is way less rasp sound and not having to use hptuners to get rid of it in your system. disadvantage is slightly less hp gains. cat will pass inspection even if its a high flow cat.
^ Pretty much says it all
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