removing rear cat?
#1
Member
Thread Starter
removing rear cat?
Hi. My 2001 W210 has 140,000. The exhasust (Remus) has been making marbles in a tin can sounds for several months and I finally went in to a muffler place... the right rear cat is completely broken.
I can replace it with an aftermarket cat for abouyt $300, or just rip it out and replace with straight pipe. Uf I just rip it out, (cost of $30)
1. Is this legal?
2. will it still pass a smog test... I have one coming up in November
3. If I take out this rear right cat, but leave in the rear left cat, will it imbalance the exahaust and hurt the engine?
Thanks!
I can replace it with an aftermarket cat for abouyt $300, or just rip it out and replace with straight pipe. Uf I just rip it out, (cost of $30)
1. Is this legal?
2. will it still pass a smog test... I have one coming up in November
3. If I take out this rear right cat, but leave in the rear left cat, will it imbalance the exahaust and hurt the engine?
Thanks!
#2
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Join Date: May 2007
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Used to drive E55
Hi. My 2001 W210 has 140,000. The exhasust (Remus) has been making marbles in a tin can sounds for several months and I finally went in to a muffler place... the right rear cat is completely broken.
I can replace it with an aftermarket cat for abouyt $300, or just rip it out and replace with straight pipe. Uf I just rip it out, (cost of $30)
1. Is this legal?
2. will it still pass a smog test... I have one coming up in November
3. If I take out this rear right cat, but leave in the rear left cat, will it imbalance the exahaust and hurt the engine?
Thanks!
I can replace it with an aftermarket cat for abouyt $300, or just rip it out and replace with straight pipe. Uf I just rip it out, (cost of $30)
1. Is this legal?
2. will it still pass a smog test... I have one coming up in November
3. If I take out this rear right cat, but leave in the rear left cat, will it imbalance the exahaust and hurt the engine?
Thanks!
![Big Grin](https://mbworld.org/forums/images/smilies/biggrin.gif)
#4
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W210 E55 AMG
Im in Los angeles and The "Smog Guy" i use said that I "might pass" the Smog test with only the 1st primary cats installed (2nd cats deleted). But Would not pass visual smog test.
california Law says that CATS, Headers, and muffler have to have factory parts that meet certain california smog levels. If the aftermarket part dose not have the "emission" code it is consider illegal.
I know a smog place that doesn't check visual cats or headers, But I still dont know if i could pass with out my second cats gone or with high performance cats.
california Law says that CATS, Headers, and muffler have to have factory parts that meet certain california smog levels. If the aftermarket part dose not have the "emission" code it is consider illegal.
I know a smog place that doesn't check visual cats or headers, But I still dont know if i could pass with out my second cats gone or with high performance cats.
#5
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Used to drive E55
Im in Los angeles and The "Smog Guy" i use said that I "might pass" the Smog test with only the 1st primary cats installed (2nd cats deleted). But Would not pass visual smog test.
california Law says that CATS, Headers, and muffler have to have factory parts that meet certain california smog levels. If the aftermarket part dose not have the "emission" code it is consider illegal.
I know a smog place that doesn't check visual cats or headers, But I still dont know if i could pass with out my second cats gone or with high performance cats.
california Law says that CATS, Headers, and muffler have to have factory parts that meet certain california smog levels. If the aftermarket part dose not have the "emission" code it is consider illegal.
I know a smog place that doesn't check visual cats or headers, But I still dont know if i could pass with out my second cats gone or with high performance cats.
#6
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2002 E55 - Tectite
After Market Cats for California
It is illegal to remove cats in California, thanks to CARB.
Here's the link to the California Air Resources Board (CARB) page that talks about legal after market cats:
http://www.arb.ca.gov/msprog/aftermk...ftermktcat.htm
After looking at all the pdf's, you will find that Miller Catalyzer Corp in Hayward sells P/N's 11212 for $175 each and 12212 for $250 each. One is a replacement for the primary cats, and one is a replacement for the secondary cats. These are high flow metal cats. I am not affiliated with Miller. I just did a lot of research and wanted to share what I found out.
Here's the link to the California Air Resources Board (CARB) page that talks about legal after market cats:
http://www.arb.ca.gov/msprog/aftermk...ftermktcat.htm
After looking at all the pdf's, you will find that Miller Catalyzer Corp in Hayward sells P/N's 11212 for $175 each and 12212 for $250 each. One is a replacement for the primary cats, and one is a replacement for the secondary cats. These are high flow metal cats. I am not affiliated with Miller. I just did a lot of research and wanted to share what I found out.
#7
Out Of Control!
I can replace it with an aftermarket cat for abouyt $300, or just rip it out and replace with straight pipe. Uf I just rip it out, (cost of $30)
1. Is this legal?
2. will it still pass a smog test... I have one coming up in November
3. If I take out this rear right cat, but leave in the rear left cat, will it imbalance the exahaust and hurt the engine?
Thanks!
1. Is this legal?
2. will it still pass a smog test... I have one coming up in November
3. If I take out this rear right cat, but leave in the rear left cat, will it imbalance the exahaust and hurt the engine?
Thanks!
1. Nope (i'm the only who's legal around here.
![hammer](https://mbworld.org/forums/images/smilies/bonk.gif)
![rolf](https://mbworld.org/forums/images/smilies/rofl.gif)
2. Nope
3. Yes. You'll get CEL.
Just had my smog done a few weeks ago and kind of failed (long story that i'm not going into) but a week later passed. lol!
![Big Grin](https://mbworld.org/forums/images/smilies/biggrin.gif)
![thumbs](https://mbworld.org/forums/images/smilies/thumbsup.gif)
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#8
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Used to drive E55
If you rip it out you will not pass the SMOG. Just replace it with a Random tech or you can do a temporary cat replacement and then remove it after you're done with the SMOG test but is it worth it?
1. Nope (i'm the only who's legal around here.
lol!
)
2. Nope
3. Yes. You'll get CEL.
Just had my smog done a few weeks ago and kind of failed (long story that i'm not going into) but a week later passed. lol!
![thumbs](https://mbworld.org/forums/images/smilies/thumbsup.gif)
1. Nope (i'm the only who's legal around here.
![hammer](https://mbworld.org/forums/images/smilies/bonk.gif)
![rolf](https://mbworld.org/forums/images/smilies/rofl.gif)
2. Nope
3. Yes. You'll get CEL.
Just had my smog done a few weeks ago and kind of failed (long story that i'm not going into) but a week later passed. lol!
![Big Grin](https://mbworld.org/forums/images/smilies/biggrin.gif)
![thumbs](https://mbworld.org/forums/images/smilies/thumbsup.gif)
![smash](https://mbworld.org/forums/images/smilies/smashfreak.gif)
![Smilie](https://mbworld.org/forums/images/smilies/smile.gif)
#9
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E55
If you rip it out you will not pass the SMOG. Just replace it with a Random tech or you can do a temporary cat replacement and then remove it after you're done with the SMOG test but is it worth it?
1. Nope (i'm the only who's legal around here.
lol!
)
2. Nope
3. Yes. You'll get CEL.
Just had my smog done a few weeks ago and kind of failed (long story that i'm not going into) but a week later passed. lol!
![thumbs](https://mbworld.org/forums/images/smilies/thumbsup.gif)
1. Nope (i'm the only who's legal around here.
![hammer](https://mbworld.org/forums/images/smilies/bonk.gif)
![rolf](https://mbworld.org/forums/images/smilies/rofl.gif)
2. Nope
3. Yes. You'll get CEL.
Just had my smog done a few weeks ago and kind of failed (long story that i'm not going into) but a week later passed. lol!
![Big Grin](https://mbworld.org/forums/images/smilies/biggrin.gif)
![thumbs](https://mbworld.org/forums/images/smilies/thumbsup.gif)
![Big Grin](https://mbworld.org/forums/images/smilies/biggrin.gif)
#10
Out Of Control!
#12
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1999 E55 AMG
Sorry to bring this old thread alive again but I am pretty sure that removing the secondary cats will cause a CEL, unless of course you re-weld the O2 sensor in the straight pipe where the cat used to be. EDIT: I was just thinking. Is the secondary O2 sensor before the second cat? If so, removing the secondary cat wouldn't cause a CEL.
On that note, I am getting a CEL for the right rear O2 sensor. I'm thinking that it's actually not the O2 sensor that is bad but rather the cat. I say this because that cat has been rattling for about 8 months. What is everyones thoughts? Do you think a bad cat can cause a bad O2 sensor CEL?
On that note, I am getting a CEL for the right rear O2 sensor. I'm thinking that it's actually not the O2 sensor that is bad but rather the cat. I say this because that cat has been rattling for about 8 months. What is everyones thoughts? Do you think a bad cat can cause a bad O2 sensor CEL?
Last edited by R.J.; 06-23-2011 at 11:58 AM.
#13
Super Member
Hi. My 2001 W210 has 140,000. The exhasust (Remus) has been making marbles in a tin can sounds for several months and I finally went in to a muffler place... the right rear cat is completely broken.
I can replace it with an aftermarket cat for abouyt $300, or just rip it out and replace with straight pipe. Uf I just rip it out, (cost of $30)
1. Is this legal?
2. will it still pass a smog test... I have one coming up in November
3. If I take out this rear right cat, but leave in the rear left cat, will it imbalance the exahaust and hurt the engine?
Thanks!
I can replace it with an aftermarket cat for abouyt $300, or just rip it out and replace with straight pipe. Uf I just rip it out, (cost of $30)
1. Is this legal?
2. will it still pass a smog test... I have one coming up in November
3. If I take out this rear right cat, but leave in the rear left cat, will it imbalance the exahaust and hurt the engine?
Thanks!
![Big Grin](https://mbworld.org/forums/images/smilies/biggrin.gif)
![Frown](https://mbworld.org/forums/images/smilies/frown.gif)
#14
Super Member
Rattles can certainly be a cat however, I think even removing all converters but leaving the O2 sensor in won't cause any problems or CELs. I could be wrong. If I am wrong then removing only the cats behind the O2 sensor will NOT cause CELs.