Secondary Cat delete on C63s Perf Exhaust
09-28-2020, 06:43 PM
#326
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2020 C63 Coupe
I just had this done yesterday to my c63s with the sports exhaust(non-pe) and the car is much more livelier. The car stock had a nice mean tone from the outside but it was barely audible from inside the cabin. I can now hear the exhaust snap and crackle with the windows up and it’s intoxicating. The sound level has increased 15-20%.
My shop replaced mine with bent 3” 304 stainless and it took roughly 1.75 hours.
Pm if you need a good shop in SoCal.
My shop replaced mine with bent 3” 304 stainless and it took roughly 1.75 hours.
Pm if you need a good shop in SoCal.
10-12-2020, 07:21 PM
#327
Junior Member
10-17-2020, 01:17 AM
#332
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700HP Facelift converted PFL C63 S Coupe
🔹 Hi tech mufflers in Darlinghurst: $1000
🔹 International Auto-haus in Rockdale $900
🔹 Autowerks Beverly Hills $800
🔹 Western Mufflers in Fairfield $250
You get what you pay for though and International Auto-haus is where I got mine. I chose them instead of the cheaper guys because they do all the work on my car and will do a good job without cutting your heat shield or any fu*king around.
Last edited by Jimmy_c63s; 10-17-2020 at 01:20 AM. Reason: Added an extra one
10-17-2020, 06:38 AM
#333
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W205 C63s Coupe
You've got four options.
🔹 Hi tech mufflers in Darlinghurst: $1000
🔹 International Auto-haus in Rockdale $900
🔹 Autowerks Beverly Hills $800
🔹 Western Mufflers in Fairfield $250
You get what you pay for though and International Auto-haus is where I got mine. I chose them instead of the cheaper guys because they do all the work on my car and will do a good job without cutting your heat shield or any fu*king around.
🔹 Hi tech mufflers in Darlinghurst: $1000
🔹 International Auto-haus in Rockdale $900
🔹 Autowerks Beverly Hills $800
🔹 Western Mufflers in Fairfield $250
You get what you pay for though and International Auto-haus is where I got mine. I chose them instead of the cheaper guys because they do all the work on my car and will do a good job without cutting your heat shield or any fu*king around.
10-17-2020, 05:30 PM
#334
Member
Hi anyone here deleted the resonator on the Performance exhaust system of 63s. Any improvement or does it make it loud? Any experience losing power/torque or drone. I know downpipes is the way to go for louder exhaust note am not just ready to pull down the Trannie. Appreciate inputs. Thank you
10-18-2020, 10:37 AM
#335
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700HP Facelift converted PFL C63 S Coupe
I have done this, much better sound was the result. The car was dyno'd after but that dyno also included a ECU/TCU tune so hard to gives specifics on how the 2nd Cat delete helped but in saying that, it would have improved flow, much angrier sounding, no drone and I'm certainly happy it was done.
How good is it though? Car can be so quiet when you want it to then totally transform into a riot with some downshifting and acceleration 🙉
It's rude.
10-18-2020, 06:11 PM
#336
Member
It definitely goes harder when you nail it especially in 3rd gear all the way up to redline with exhaust open or closed, you're not imagining it.
How good is it though? Car can be so quiet when you want it to then totally transform into a riot with some downshifting and acceleration 🙉
It's rude.
How good is it though? Car can be so quiet when you want it to then totally transform into a riot with some downshifting and acceleration 🙉
It's rude.
12-09-2020, 03:01 AM
#337
Secondary Cat delete kit
Hi guys, looking for a secondary cat delete kit, is there any kit in the market with a good price? i was searching and i found for W204, but not for W205 version of C63.
02-22-2021, 07:37 PM
#338
theres alot of good info in here on what it sounds like with the second cats gone. theres too many damn pages in this thread so i didnt read the entire thing. does anyone have any experience with doing a muffler delete on the C63?? or experience doing the second cat delete AND a muffler delete?? im wondering what it does to the sound. too raspy? too poppy? any deeper?(lower pitch) or even better than just the cat delete???
i ask becasue im coming from another car a 6.2L V8 an instead of doin a whole cat back exhaust system i just cut the mufflers out an put straight pipes to the exhaust tips. cost 0$ and REALLY wakes up the sounds of the car. def more burble an pops but it just raises the exhaust volume by alot, sounds better, deeper an more powerful overall. im wanting to see if it does the same with the C63. or if its too raspy/poppy..... any info helps thanks.
i ask becasue im coming from another car a 6.2L V8 an instead of doin a whole cat back exhaust system i just cut the mufflers out an put straight pipes to the exhaust tips. cost 0$ and REALLY wakes up the sounds of the car. def more burble an pops but it just raises the exhaust volume by alot, sounds better, deeper an more powerful overall. im wanting to see if it does the same with the C63. or if its too raspy/poppy..... any info helps thanks.
02-25-2021, 10:57 AM
#340
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2021 Mercedes C63s AMG Coupe
I wanted to do it, but my nearest dealership have been very honest and clear that if I do anything to do the OEM downpipe, they will unfortunately have to flag the car. They did mention it is a soft flag, in the sense they will just record it in the system I have done it. But once the car is flagged, all my warranty work will have to be approved before they can be performed.
This sounds like a massive headache just to do a secondary delete. So I have come up with another plan, I am in the process of buying a used set of pre facelift OEM downpipe. Once I have that, I will be gutting OEM Secondary CAT, but this creates it’s own issues. An empty secondary cat is going to create a lot of back pressure (counter intuitive I know). So, to get around this, I will have to weld a straight pipe into the secondary cat. Once all this is done, I will install it back into the car and not visit the dealership for a few months until the weld browns and blends. After that they should not technically have any idea.
This sounds like a massive headache just to do a secondary delete. So I have come up with another plan, I am in the process of buying a used set of pre facelift OEM downpipe. Once I have that, I will be gutting OEM Secondary CAT, but this creates it’s own issues. An empty secondary cat is going to create a lot of back pressure (counter intuitive I know). So, to get around this, I will have to weld a straight pipe into the secondary cat. Once all this is done, I will install it back into the car and not visit the dealership for a few months until the weld browns and blends. After that they should not technically have any idea.
02-25-2021, 11:49 AM
#341
I wanted to do it, but my nearest dealership have been very honest and clear that if I do anything to do the OEM downpipe, they will unfortunately have to flag the car. They did mention it is a soft flag, in the sense they will just record it in the system I have done it. But once the car is flagged, all my warranty work will have to be approved before they can be performed.
This sounds like a massive headache just to do a secondary delete. So I have come up with another plan, I am in the process of buying a used set of pre facelift OEM downpipe. Once I have that, I will be gutting OEM Secondary CAT, but this creates it’s own issues. An empty secondary cat is going to create a lot of back pressure (counter intuitive I know). So, to get around this, I will have to weld a straight pipe into the secondary cat. Once all this is done, I will install it back into the car and not visit the dealership for a few months until the weld browns and blends. After that they should not technically have any idea.
This sounds like a massive headache just to do a secondary delete. So I have come up with another plan, I am in the process of buying a used set of pre facelift OEM downpipe. Once I have that, I will be gutting OEM Secondary CAT, but this creates it’s own issues. An empty secondary cat is going to create a lot of back pressure (counter intuitive I know). So, to get around this, I will have to weld a straight pipe into the secondary cat. Once all this is done, I will install it back into the car and not visit the dealership for a few months until the weld browns and blends. After that they should not technically have any idea.
02-25-2021, 08:27 PM
#343
2021 with Pre-facelift downpipes
I just swapped my Edition 1 for a 2021. Can anyone please share any video representative of what their car sounds like inside and out with pre-facelift downpipes on a facelift car? Thanks.
02-26-2021, 01:34 AM
#344
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2020 C63 Coupe
I've never seen this being done on a facelift C63, might be a difficult job that is not worth it (might as well get aftermarket downpipes considering the labor cost). However, if you want a cheap OEM like way to get your car sounding like the pre-facelift, I suggest you do a secondary cat delete. I did one on mine and it really wakes the car up. I would say the sound is comparable to a stock pre-facelift.
02-26-2021, 09:57 AM
#346
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2021 Mercedes C63s AMG Coupe
I wanted to do the secondary cat delete with the original CAT, but my nearest dealership have been very honest and clear that if I do anything to do the OEM downpipe, they will unfortunately have to flag the car. They did mention it is a soft flag, in the sense they will just record it in the system I have done it. But once the car is flagged, all my warranty work will have to be approved before they can be performed.
This sounds like a massive headache just to do a secondary delete. So I have come up with another plan, I am in the process of buying a used set of pre facelift OEM downpipe. Once I have that, I will be gutting OEM Secondary CAT, but this creates it’s own issues. An empty secondary cat is going to create a lot of back pressure (counter intuitive I know). So, to get around this, I will have to weld a straight pipe into the secondary cat. Once all this is done, I will install it back into the car and not visit the dealership for a few months until the weld browns and blends. After that they should not technically have any idea.
This sounds like a massive headache just to do a secondary delete. So I have come up with another plan, I am in the process of buying a used set of pre facelift OEM downpipe. Once I have that, I will be gutting OEM Secondary CAT, but this creates it’s own issues. An empty secondary cat is going to create a lot of back pressure (counter intuitive I know). So, to get around this, I will have to weld a straight pipe into the secondary cat. Once all this is done, I will install it back into the car and not visit the dealership for a few months until the weld browns and blends. After that they should not technically have any idea.
09-03-2021, 01:52 PM
#347
To clarify, the sound reduction in the standard W205 C63/S is:
turbos -> primary cats -> secondary cats -> valved h-pipe -> rear mufflers (valved on performance exhaust)
Options to make louder are to remove one or both cats and/or the rear mufflers. Because of the turbo adding silencing, removing the secondary cats on the W205 is akin to removing the resonator on the W204 (which went primary cats -> secondary cats -> resonator -> rear mufflers)
turbos -> primary cats -> secondary cats -> valved h-pipe -> rear mufflers (valved on performance exhaust)
Options to make louder are to remove one or both cats and/or the rear mufflers. Because of the turbo adding silencing, removing the secondary cats on the W205 is akin to removing the resonator on the W204 (which went primary cats -> secondary cats -> resonator -> rear mufflers)
09-03-2021, 02:10 PM
#348
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700HP Facelift converted PFL C63 S Coupe
Here's Weistec catless downpipes as an example vs stock
The following users liked this post:
jmfabr2rc (09-03-2021)
10-06-2021, 04:07 PM
#349
I just had this done yesterday to my c63s with the sports exhaust(non-pe) and the car is much more livelier. The car stock had a nice mean tone from the outside but it was barely audible from inside the cabin. I can now hear the exhaust snap and crackle with the windows up and it’s intoxicating. The sound level has increased 15-20%.
My shop replaced mine with bent 3” 304 stainless and it took roughly 1.75 hours.
Pm if you need a good shop in SoCal.
My shop replaced mine with bent 3” 304 stainless and it took roughly 1.75 hours.
Pm if you need a good shop in SoCal.
10-06-2021, 11:49 PM
#350
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16' C63s, 22' RAM 1500
I just got my mufflers deleted today and damn I wish it did have resonators car is stupid loud. Fml getting resonators installed soon hopefully
