C63 no Secondary Cats
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c63
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Thanks. I am just wondering if the gains that Brian GT PRO got was from the elimination of the secondary cats or combo of elimination and replacing with an X-pipe.
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From: FL
'09 C63 AMG
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'09 C63 AMG
You can upload them to either You-Tube or Photobucket and insert the links on here.
What kind of straight pipes did you use?
Have you dyno'd...any HP/TQ gains? Thanks.
What kind of straight pipes did you use?
Have you dyno'd...any HP/TQ gains? Thanks.
Last edited by sflgator; Oct 1, 2009 at 02:08 PM.
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'09 C63 AMG
I mean these things are $57 each; Brian from GT PRO insists his ~ $600 X-pipe is better and makes gains, but is that from the X-pipe or just from removing the secondary cats? http://vibrantperformance.com/catalo...roducts_id=290
Last edited by sflgator; Oct 1, 2009 at 02:09 PM.
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Inquiring minds want to know. The Vibrant resonator is a very high quality piece. I like Brian's idea of reversibility. If you want to be able to reuse your secondary CATs in the future, you may run out of stock piping and have to recreate the two s-bends in front of the secondary CATs. This will mean you have to buy 4 90 degree mandrel bent elbows as well.
The Vibrant resonator is a very high quality piece. I like Brian's idea of reversibility. If you want to be able to reuse your secondary CATs in the future, you may run out of stock piping and have to recreate the two s-bends in front of the secondary CATs. This will mean you have to buy 4 90 degree mandrel bent elbows as well.
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'09 C63 AMG
All this "Exhaust, X-pipe, Cats, H-pipe, Resonator" talk sparked my curiosity, so, I visited a reputable local custom exhaust shop today.
And here's another question to ponder (and hopefully, someone has an accurate answer
)...
Does the oem stock C63 AMG exhaust already have high-flow cats?
The reason I ask is b/c I don't think I really want to remove the secondary cats (it's illegal btw
) and thought that maybe a HP/TQ gain could be had with high-flow cats instead (if the oem stock exhaust didn't already have them in place).
So, does anyone know the specs on our secondary cats and if they are indeed high-flow cats or just plain old regular cats?
When I went to the custom exhaust shop today, the owner who's been in business for > 25 years took one look at my C63 AMG exhaust, and kind of scratched his head, paused, and said, "I'm not sure if there's much I could do here...this is a very well-engineered exhaust by AMG."
He said he could switch out the secondary cats for high-flow cats if they weren't already high-flow cats to begin with AND add an X-pipe in place of the resonator, but he has no idea about how much more sound that would produce (could be a lot more than I want without the resonator; a little more deep growl would be fine though). I mentioned to him that many ppl who removed the resonator are sorry they did, and are looking to put it back in place, and only deal with the secondary cats.
Any thoughts?
And here's another question to ponder (and hopefully, someone has an accurate answer
)...Does the oem stock C63 AMG exhaust already have high-flow cats?
The reason I ask is b/c I don't think I really want to remove the secondary cats (it's illegal btw
) and thought that maybe a HP/TQ gain could be had with high-flow cats instead (if the oem stock exhaust didn't already have them in place). So, does anyone know the specs on our secondary cats and if they are indeed high-flow cats or just plain old regular cats?
When I went to the custom exhaust shop today, the owner who's been in business for > 25 years took one look at my C63 AMG exhaust, and kind of scratched his head, paused, and said, "I'm not sure if there's much I could do here...this is a very well-engineered exhaust by AMG."
He said he could switch out the secondary cats for high-flow cats if they weren't already high-flow cats to begin with AND add an X-pipe in place of the resonator, but he has no idea about how much more sound that would produce (could be a lot more than I want without the resonator; a little more deep growl would be fine though).
I mentioned to him that many ppl who removed the resonator are sorry they did, and are looking to put it back in place, and only deal with the secondary cats.Any thoughts?
Last edited by sflgator; Oct 1, 2009 at 05:51 PM.
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C63 AMG
All this "Exhaust, X-pipe, Cats, H-pipe, Resonator" talk sparked my curiosity, so, I visited a reputable local custom exhaust shop today.
And here's another question to ponder (and hopefully, someone has an accurate answer)...
Does the oem stock C63 AMG exhaust already have high-flow cats?
The reason I ask is b/c I don't think I really want to remove the secondary cats (it's illegal btw ) and thought that maybe a HP/TQ gain could be had with high-flow cats instead (if the oem stock exhaust didn't already have them in place).
So, does anyone know the specs on our secondary cats and if they are indeed high-flow cats or just plain old regular cats?
When I went to the custom exhaust shop today, the owner who's been in business for > 25 years took one look at my C63 AMG exhaust, and kind of scratched his head, paused, and said, "I'm not sure if there's much I could do here...this is a very well-engineered exhaust by AMG."
He said he could switch out the secondary cats for high-flow cats if they weren't already high-flow cats to begin with AND add an X-pipe in place of the resonator, but he has no idea about how much more sound that would produce (could be a lot more than I want without the resonator; a little more deep growl would be fine though). I mentioned to him that many ppl who removed the resonator are sorry they did, and are looking to put it back in place, and only deal with the secondary cats.
Any thoughts?
And here's another question to ponder (and hopefully, someone has an accurate answer
)...Does the oem stock C63 AMG exhaust already have high-flow cats?
The reason I ask is b/c I don't think I really want to remove the secondary cats (it's illegal btw
) and thought that maybe a HP/TQ gain could be had with high-flow cats instead (if the oem stock exhaust didn't already have them in place). So, does anyone know the specs on our secondary cats and if they are indeed high-flow cats or just plain old regular cats?
When I went to the custom exhaust shop today, the owner who's been in business for > 25 years took one look at my C63 AMG exhaust, and kind of scratched his head, paused, and said, "I'm not sure if there's much I could do here...this is a very well-engineered exhaust by AMG."
He said he could switch out the secondary cats for high-flow cats if they weren't already high-flow cats to begin with AND add an X-pipe in place of the resonator, but he has no idea about how much more sound that would produce (could be a lot more than I want without the resonator; a little more deep growl would be fine though).
I mentioned to him that many ppl who removed the resonator are sorry they did, and are looking to put it back in place, and only deal with the secondary cats.Any thoughts?
Well wrote, i was thinking the high flow CATS as well, if thats the case, there is no point, then just the header and L/T from K2 then
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From: FL
'09 C63 AMG
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What...seriously, are you sure? How do you know this and why the play on words? i.e. - the custom exhaust shop owner said something about most cats allowing ~ 200psi and the high-flow cats he has allowing 400psi...or something to that effect. Do you or anyone else know the specs of our oem secondary cats?
i.e. - the custom exhaust shop owner said something about most cats allowing ~ 200psi and the high-flow cats he has allowing 400psi...or something to that effect. Do you or anyone else know the specs of our oem secondary cats?
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2009 040 Black C63, 2009 Arctic White G55, 2012 Storm Red CLS550 4Matic
where is the dyno results with straight pipes in place of the secondary cats? any power gains? i went to an exhaust shop this past weekend and asked how much it would cost to remove the secondary cats and the guy literally started laughing at me and said "you wont even be able to get up a hill if you remove it, you will have CEL warnings popping up and you will get beat by ****ing volkswagens" that is exactly what he said. i did not say a word and walked out of the shop
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'09 C63 AMG
where is the dyno results with straight pipes in place of the secondary cats? any power gains? i went to an exhaust shop this past weekend and asked how much it would cost to remove the secondary cats and the guy literally started laughing at me and said "you wont even be able to get up a hill if you remove it, you will have CEL warnings popping up and you will get beat by ****ing volkswagens" that is exactly what he said. i did not say a word and walked out of the shop
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c63
Im sorry it took soo long guy!
but here are the b4 and after of removing second cats. The gain is 10rwp
http://www.youtube.com/watch?v=EyzvRu9HZ_Y
http://www.youtube.com/watch?v=yJiIJ12-s9s
but here are the b4 and after of removing second cats. The gain is 10rwp
http://www.youtube.com/watch?v=EyzvRu9HZ_Y
http://www.youtube.com/watch?v=yJiIJ12-s9s
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2009 C63 AMG Black on Black PP Package CF fully loaded
Im sorry it took soo long guy!
but here are the b4 and after of removing second cats. The gain is 10rwp
http://www.youtube.com/watch?v=EyzvRu9HZ_Y
http://www.youtube.com/watch?v=yJiIJ12-s9s
but here are the b4 and after of removing second cats. The gain is 10rwp
http://www.youtube.com/watch?v=EyzvRu9HZ_Y
http://www.youtube.com/watch?v=yJiIJ12-s9s
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C63 AMG
Im sorry it took soo long guy!
but here are the b4 and after of removing second cats. The gain is 10rwp
http://www.youtube.com/watch?v=EyzvRu9HZ_Y
http://www.youtube.com/watch?v=yJiIJ12-s9s
but here are the b4 and after of removing second cats. The gain is 10rwp
http://www.youtube.com/watch?v=EyzvRu9HZ_Y
http://www.youtube.com/watch?v=yJiIJ12-s9s
Those are 2 different cars. Not a good comparative.
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c63
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C63
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2005 Mercedes G55 AMG
