Secondary Cat delete on C63s Perf Exhaust
Member
Joined: Aug 2016
Posts: 243
Likes: 27
W205 C63 AMG
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.
Member
Joined: Mar 2015
Posts: 198
Likes: 22
c63s sedan
Gutting was just far easier than replacing. they cut the down pipe at the bottom of the car and took it off where the clamp goes.. then gutted everything out. then welded the original pipe back together and put clamp back on too.
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From: ATLANTA
R Nine T
So you have a hollow Cat can inline on your exhaust?? You don't think that creates turbulence?
Junior Member
Joined: Dec 2016
Posts: 61
Likes: 13
2017 C63S Convertible
Just had mine removed and it sounds GREAAAT! No drone. About 25% louder. Backfires sound like bombs are going off .
Best $225 spent. Others have paid less, but supposedly Shop used TIG welding instead of MIG welding, which takes longer with better results?
Video clip doesn't reproduce sound well.
Best $225 spent. Others have paid less, but supposedly Shop used TIG welding instead of MIG welding, which takes longer with better results?
Video clip doesn't reproduce sound well.
MBWorld Fanatic!
Joined: Sep 2015
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From: Sydney
AMG GLC63 E-Performance Edition 1
Just had mine removed and it sounds GREAAAT! No drone. About 25% louder. Backfires sound like bombs are going off .
Best $225 spent. Others have paid less, but supposedly Shop used TIG welding instead of MIG welding, which takes longer with better results?
Video clip doesn't reproduce sound well.
Best $225 spent. Others have paid less, but supposedly Shop used TIG welding instead of MIG welding, which takes longer with better results?
Video clip doesn't reproduce sound well.
Dropping car off this Friday to have it done
Any diff when the exhaust is not open?
I've heard this is better than any cat back exhaust out there lol
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Joined: Nov 2001
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From: THE Orange County, California
2024 C8 Z06- 2025 BMW CS- 2022 Porsche 992 GTS
Just had mine removed and it sounds GREAAAT! No drone. About 25% louder. Backfires sound like bombs are going off .
Best $225 spent. Others have paid less, but supposedly Shop used TIG welding instead of MIG welding, which takes longer with better results?
Video clip doesn't reproduce sound well.
Best $225 spent. Others have paid less, but supposedly Shop used TIG welding instead of MIG welding, which takes longer with better results?
Video clip doesn't reproduce sound well.
Junior Member
Joined: Dec 2016
Posts: 61
Likes: 13
2017 C63S Convertible
I just picked up the car today and it's raining, so didn't get to play around too much. I never drive with the valves closed, so it's hard for me to tell. I'll drive w the valves closed tomorrow.
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Member
Joined: Feb 2017
Posts: 135
Likes: 24
From: Los Angeles
2016 C63s Sedan
Yo, c63sed1, thanks for the pics.
Sanch, looking forward to your report.
Mines in the shop getting chrome delete right now. This is next on my list.
Just wanted to ask you guys again...
Any chance this mod reduces power/horsepower/torque?
Thanks
Sanch, looking forward to your report.
Mines in the shop getting chrome delete right now. This is next on my list.
Just wanted to ask you guys again...
Any chance this mod reduces power/horsepower/torque?
Thanks
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Joined: Sep 2015
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From: Sydney
AMG GLC63 E-Performance Edition 1
None from what I've heard.
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Joined: Dec 2016
Posts: 61
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2017 C63S Convertible
I think Vic has more experience w the Cat deletes on his cars.
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Joined: Nov 2001
Posts: 12,263
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From: THE Orange County, California
2024 C8 Z06- 2025 BMW CS- 2022 Porsche 992 GTS
I haven't heard of any complaints. I've had mine done for a day now. To me, it's a calculated risk. It's relatively non invasive mod w low risk and low cost, w high return in terms of satisfaction. And it's reversible if necessary. I'm willing to take that miniscule risk.
I think Vic has more experience w the Cat deletes on his cars.
I think Vic has more experience w the Cat deletes on his cars.
2010 E63
2012 E63 Estate
2012 CLS63
2012 C63 Black Series
2013 SL63
2014 Audi RS7 (yes and no power lost- pulled two resonators our here)
I have spoke with many experienced tuners and techs in the Benz world; the resonator delete does not affect power and I doubt the secondary cat here will be an issue either. Im definitely going to do this on the C63S but I need to get up to muffler shop in Long Beach first (they did all the above cars).
Senior Member
Joined: Oct 2006
Posts: 258
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From: Orange County
2019 Audi SQ5, 2011 Toyota Tacoma TRD 4wd, 2016 Ford Focus se Hatchback
Technically I have done a lot of resonator deletes but our cars (C63S) do not have resonators by title. But in a sense, the same product is being removed as its post header and the CEL sensor triggers are prior. On the following cars I have done a resonator delete with no issues to power/tq and just a decent increase in sound, burble, fires. Now keep in mind, these parts were probably more restrictive in nature than what we are all talking about here so the sound gains were more on the cars below:
2010 E63
2012 E63 Estate
2012 CLS63
2012 C63 Black Series
2013 SL63
2014 Audi RS7 (yes and no power lost- pulled two resonators our here)
I have spoke with many experienced tuners and techs in the Benz world; the resonator delete does not affect power and I doubt the secondary cat here will be an issue either. Im definitely going to do this on the C63S but I need to get up to muffler shop in Long Beach first (they did all the above cars).
2010 E63
2012 E63 Estate
2012 CLS63
2012 C63 Black Series
2013 SL63
2014 Audi RS7 (yes and no power lost- pulled two resonators our here)
I have spoke with many experienced tuners and techs in the Benz world; the resonator delete does not affect power and I doubt the secondary cat here will be an issue either. Im definitely going to do this on the C63S but I need to get up to muffler shop in Long Beach first (they did all the above cars).
Are you still thinking about doing this mod on your C63S, Vic?
Administrator
Joined: Nov 2001
Posts: 12,263
Likes: 901
From: THE Orange County, California
2024 C8 Z06- 2025 BMW CS- 2022 Porsche 992 GTS
100% see the last sentence on my last post 
I have spoke with many experienced tuners and techs in the Benz world; the resonator delete does not affect power and I doubt the secondary cat here will be an issue either. Im definitely going to do this on the C63S but I need to get up to muffler shop in Long Beach first (they did all the above cars).
Senior Member
Joined: Oct 2006
Posts: 258
Likes: 72
From: Orange County
2019 Audi SQ5, 2011 Toyota Tacoma TRD 4wd, 2016 Ford Focus se Hatchback
Administrator
Joined: Nov 2001
Posts: 12,263
Likes: 901
From: THE Orange County, California
2024 C8 Z06- 2025 BMW CS- 2022 Porsche 992 GTS
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c63s sedan
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From: Austin, TX
2017 Porsche 911 C4
Administrator
Joined: Nov 2001
Posts: 12,263
Likes: 901
From: THE Orange County, California
2024 C8 Z06- 2025 BMW CS- 2022 Porsche 992 GTS
