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C219 CLS55 and CLS63, 2004-2010

second cats

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Old Jan 27, 2014 | 10:34 PM
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E350 4matic, Porsche Cayenne S
second cats
Hey guys, does anyone know if I delete the second catalytic and put a custom free flow catalytic, will the engine light on?
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Old Jan 28, 2014 | 07:46 AM
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I don't think so, there's no sensor after the second cats. Full delete won't even throw a code.
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Old Jan 28, 2014 | 09:47 AM
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why would you delete the secondary cats to add more cats?

Just delete them and do an x pipe
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Old Jan 29, 2014 | 12:11 AM
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E350 4matic, Porsche Cayenne S
Hey guys,
so yeah, I didn't add more cats. I made it straight instead of X pipe. And just done it today. Well, it sounds cool on high rpm and stay quite at low rpm. And yeah, no check engine light was on.
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Old Feb 19, 2014 | 04:38 AM
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W211 E63
Originally Posted by BlackB-Wald
Hey guys,
so yeah, I didn't add more cats. I made it straight instead of X pipe. And just done it today. Well, it sounds cool on high rpm and stay quite at low rpm. And yeah, no check engine light was on.
any power gain?
can you share some pics of the new setup?
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Old Feb 21, 2014 | 04:57 AM
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E350 4matic, Porsche Cayenne S
i don't know if there's any significant power gain. Well, I don't think I can take any picture of it. But let's see if later on I decide to make a custom smaller resonator, I might be able to share the picture for you.
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Old Feb 21, 2014 | 09:05 AM
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S63
Did you remove the resonator too to just the cat? Is it raspy? How is cold start?
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