Secondary Cat delete on C63s Perf Exhaust
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From: Sydney
AMG GLC63 E-Performance Edition 1
I found this on Instagram, this gives a good indication to the coupe owners what the secondary cat delete sound like.
Sounds MUCH better than stock that's for sure!
Sounds MUCH better than stock that's for sure!
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Joined: Aug 2016
Posts: 243
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W205 C63 AMG
I found this on Instagram, this gives a good indication to the coupe owners what the secondary cat delete sound like.
Sounds MUCH better than stock that's for sure!
https://instagram.com/p/BPtD9pWDxF_/
Sounds MUCH better than stock that's for sure!
https://instagram.com/p/BPtD9pWDxF_/
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2024 C8 Z06- 2025 BMW CS- 2022 Porsche 992 GTS
I found this on Instagram, this gives a good indication to the coupe owners what the secondary cat delete sound like.
Sounds MUCH better than stock that's for sure!
https://instagram.com/p/BPtD9pWDxF_/
Sounds MUCH better than stock that's for sure!
https://instagram.com/p/BPtD9pWDxF_/
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2019 Audi SQ5, 2011 Toyota Tacoma TRD 4wd, 2016 Ford Focus se Hatchback
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'16 C63-S
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C63s edition 1 coupe
Hey mate have you lost any power after doing this? I removed resonator on my ML63 previously and lost a bit of power.
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2017 Porsche 911 C4
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From: Los Angeles
2016 C63s Sedan
Let me get this straight... a couple hundred bucks at a muffler shop... no gas smell in your car... no loss in power?
Will the vehicle still pass smog?
My c63s sedan is leased... is this reversible?
Anyone know a good shop in L.A., or the San Fernando Valley, that has done this on a c63s?
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From: Sydney
AMG GLC63 E-Performance Edition 1
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Mercedes-Benz E63s AMG
Correct me if I'm wrong, but looking at the diagram and pictures of the performances exhaust, if you simply go with a catless downpipe, you'll get rid of both primary and secondary cats, leaving the exhaust catless?
*and I realize by "simply", I mean dropping the transmission to swap out the entire downpipe.
*and I realize by "simply", I mean dropping the transmission to swap out the entire downpipe.
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From: Los Angeles
2016 C63s Sedan
Correct me if I'm wrong, but looking at the diagram and pictures of the performances exhaust, if you simply go with a catless downpipe, you'll get rid of both primary and secondary cats, leaving the exhaust catless?
*and I realize by "simply", I mean dropping the transmission to swap out the entire downpipe.
*and I realize by "simply", I mean dropping the transmission to swap out the entire downpipe.
A significantly less intrusive, and significantly less expensive (like 90+% cheaper) alternative, that still provides satisfying results.
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Mercedes-AMG C63S Edition 1
I definitely recommend the secondary cat delete. Got it on my car and it definitely made a difference in sound. It was also easy to do, and it was only about 200 Canadian if I remember correctly. From what I know it only takes an hour or so to do if the shop isn't busy.
Here are videos of my car.
Before the Secondary Cat Delete
After the secondary cat delete
Secondary Cat delete with software update
Here are videos of my car.
Before the Secondary Cat Delete
After the secondary cat delete
Secondary Cat delete with software update
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Joined: Mar 2015
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c63s sedan
I definitely recommend the secondary cat delete. Got it on my car and it definitely made a difference in sound. It was also easy to do, and it was only about 200 Canadian if I remember correctly. From what I know it only takes an hour or so to do if the shop isn't busy.
Here are videos of my car.
Before the Secondary Cat Delete
https://www.youtube.com/watch?v=DsVOxjqdRUI
After the secondary cat delete
https://www.youtube.com/watch?v=UjyE2wD5TQM
Secondary Cat delete with software update
https://www.youtube.com/watch?v=0f6icqercTY
Here are videos of my car.
Before the Secondary Cat Delete
https://www.youtube.com/watch?v=DsVOxjqdRUI
After the secondary cat delete
https://www.youtube.com/watch?v=UjyE2wD5TQM
Secondary Cat delete with software update
https://www.youtube.com/watch?v=0f6icqercTY
I did my secondary cat delete on weekend. We just gutted the cat tho. far easier. sounds a lot nicer few pops in it now and much throatier. no loss in power.
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W205 C63 AMG
Man, I've got my non-perf exhaust booked in to have custom rear straight pipes but now I'm worried this won't give me the same sound as gutting the secondary cats (but I'm anxious about cutting up the standard pipes rather than non-destructively swapping out the rear mufflers).
Will a rear muffler delete give a throatier sound like the secondary cat delete or just a deeper sound in people's experience?
Will a rear muffler delete give a throatier sound like the secondary cat delete or just a deeper sound in people's experience?
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Mercedes-Benz E63s AMG
What software update are you speaking of, btw? The exhaust update that has been mentioned before? I wonder if I ECU flashes (from eurocharged, renntech, etc) are incorporating the exhaust update as well -- or if it's even necessary for them to udpate.
MBWorld Fanatic!
Joined: Sep 2015
Posts: 2,137
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From: Sydney
AMG GLC63 E-Performance Edition 1
I definitely recommend the secondary cat delete. Got it on my car and it definitely made a difference in sound. It was also easy to do, and it was only about 200 Canadian if I remember correctly. From what I know it only takes an hour or so to do if the shop isn't busy.
Here are videos of my car.
Before the Secondary Cat Delete
https://www.youtube.com/watch?v=DsVOxjqdRUI
After the secondary cat delete
https://www.youtube.com/watch?v=UjyE2wD5TQM
Secondary Cat delete with software update
https://www.youtube.com/watch?v=0f6icqercTY
Here are videos of my car.
Before the Secondary Cat Delete
https://www.youtube.com/watch?v=DsVOxjqdRUI
After the secondary cat delete
https://www.youtube.com/watch?v=UjyE2wD5TQM
Secondary Cat delete with software update
https://www.youtube.com/watch?v=0f6icqercTY
Member
Joined: Aug 2016
Posts: 243
Likes: 27
W205 C63 AMG
I think I'm going to stick to the muffler thing first because it's easily reversible, then assess if I want to swap for secondary cat delete or add secondary cat delete afterwards... here's hoping it sounds good! Should be a little louder than perf exhaust because there'll be no muffling at all, like the GT-S, which completely bypasses the rear muffler in loud mode (whereas the C63 goes through the muffler with some tiny slots in the pipe for sound reduction). Secondary cat does sound good though...
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Joined: Dec 2016
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2017 C63S Convertible
What's the technical difference between gutting the secondary cat vs cutting it out? For gutting, do you still have to cut the distal end of the down pipe?
Thanks
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[QUOTE=Andyroo;7090957]Man, I've got my non-perf exhaust booked in to have custom rear straight pipes but now I'm worried this won't give me the same sound as gutting the secondary cats (but I'm anxious about cutting up the standard pipes rather than non-destructively swapping out the rear mufflers).
Will a rear muffler delete give a throatier sound like the secondary cat delete or just a deeper sound in people's experience?[/QU
They have a dozen engineers working to get that sound right on those mufflers.
The secondary cats I believe were put inline simply for cold startup emissions and noise there is no platinum in there, just some beehive looking material.
IMO your cutting out all that R&D that went into your cars sound.
Will a rear muffler delete give a throatier sound like the secondary cat delete or just a deeper sound in people's experience?[/QU
They have a dozen engineers working to get that sound right on those mufflers.
The secondary cats I believe were put inline simply for cold startup emissions and noise there is no platinum in there, just some beehive looking material.
IMO your cutting out all that R&D that went into your cars sound.
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Joined: Dec 2012
Posts: 1,537
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From: Austin, TX
2017 Porsche 911 C4
[QUOTE=AMG 17GT;7092793]
I agree with this. I recall seeing a video about the performance exhaust and they were so detailed in their R&D to get the sound right, even testing the exact number of holes drilled in one of the internal muffler pipes (I believe is was 9 holes).
The stock catback is pretty much perfect, I wouldn't mess with the rear boxes. If anything, delete the secondary cat and you have perfection through an OEM tuned exhaust.
Man, I've got my non-perf exhaust booked in to have custom rear straight pipes but now I'm worried this won't give me the same sound as gutting the secondary cats (but I'm anxious about cutting up the standard pipes rather than non-destructively swapping out the rear mufflers).
Will a rear muffler delete give a throatier sound like the secondary cat delete or just a deeper sound in people's experience?[/QU
They have a dozen engineers working to get that sound right on those mufflers.
The secondary cats I believe were put inline simply for cold startup emissions and noise there is no platinum in there, just some beehive looking material.
IMO your cutting out all that R&D that went into your cars sound.
Will a rear muffler delete give a throatier sound like the secondary cat delete or just a deeper sound in people's experience?[/QU
They have a dozen engineers working to get that sound right on those mufflers.
The secondary cats I believe were put inline simply for cold startup emissions and noise there is no platinum in there, just some beehive looking material.
IMO your cutting out all that R&D that went into your cars sound.
The stock catback is pretty much perfect, I wouldn't mess with the rear boxes. If anything, delete the secondary cat and you have perfection through an OEM tuned exhaust.
Member
Joined: Feb 2017
Posts: 135
Likes: 24
From: Los Angeles
2016 C63s Sedan
Hey guys, I've been following this thread... And forgive my ignorance here, but I've got the performance exhaust on my sedan and just wanted to confirm this before I do it...
Is there a chance that by deleting the secondary cats that the car can lose power?
Is there a chance that by deleting the secondary cats that the car can lose power?
