Secondary Cat delete on C63s Perf Exhaust - Page 7

Apr 12, 2017 | 02:38 PM

#151

Andyroo

Member

Joined: Aug 2016

Posts: 243

Likes: 27

W205 C63 AMG

Quote:

Originally Posted by Vic55

Thanks! As I understand it, the GTS bypasses the rear muffler entirely in loud mode. My non-S will probably need a rear muffler delete AND a cat delete to sound like the GTS!

Apr 12, 2017 | 03:07 PM

#152

Vic55

Administrator

Joined: Nov 2001

Posts: 12,263

Likes: 901

From: THE Orange County, California

2024 C8 Z06- 2025 BMW CS- 2022 Porsche 992 GTS

Quote:

Originally Posted by Andyroo

Thanks! As I understand it, the GTS bypasses the rear muffler entirely in loud mode. My non-S will probably need a rear muffler delete AND a cat delete to sound like the GTS!

Yes, its basically a straight piped system with 2 cats.

Apr 12, 2017 | 06:03 PM

#153

Andyroo

Member

Joined: Aug 2016

Posts: 243

Likes: 27

W205 C63 AMG

Quote:

Originally Posted by Vic55

Yes, its basically a straight piped system with 2 cats.

Do you find the GTS loud enough?

Apr 12, 2017 | 06:18 PM

#154

Vic55

Administrator

Joined: Nov 2001

Posts: 12,263

Likes: 901

From: THE Orange County, California

2024 C8 Z06- 2025 BMW CS- 2022 Porsche 992 GTS

Quote:

Originally Posted by Andyroo

Do you find the GTS loud enough?

Its subjective but Im ok with it... maybe could be 20% louder but Im probably more along the "wanting noise" side of the spectrum.

Apr 12, 2017 | 06:21 PM

#155

Wwevo9

Junior Member

Joined: Mar 2017

Posts: 19

Likes: 2

From: Belair, MD

15' c63s AMG

For those of you that have done this, can you hear the turbos while revving/driving casually like you normaly would with a cat-less downpipe? Or does the primary cat hold that noise back?

Apr 12, 2017 | 10:19 PM

#156

C63SEd1

Junior Member

Joined: Dec 2016

Posts: 61

Likes: 13

2017 C63S Convertible

Quote:

Originally Posted by Andyroo

do you know how it compares to an AMG GT in loud mode?

I haven't driven a GT yet, so can't compare. But looking forward to it at Lime Rock this summer.

Apr 12, 2017 | 10:26 PM

#157

Slowlane

Member

Joined: Dec 2016

Posts: 98

Likes: 19

From: MD

C63

Quote:

Originally Posted by C63SEd1

There's growing body of forum members who had this relatively inexpensive mod done. Myself, Sanch, Alex98, Ugotmopped, AMG 17GT, kuba.95. Not sure if I'm missing others. We all have only glowing positive reviews. Take the leap of faith and you will love it.

Apr 12, 2017 | 10:30 PM

#158

Slowlane

Member

Joined: Dec 2016

Posts: 98

Likes: 19

From: MD

C63

Quote:

Originally Posted by Wwevo9

For those of you that have done this, can you hear the turbos while revving/driving casually like you normaly would with a cat-less downpipe? Or does the primary cat hold that noise back?

I don't.

MB World Stories

The Best of Mercedes & AMG

6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Verdad Gallardo

Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Verdad Gallardo

Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Verdad Gallardo

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Verdad Gallardo

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Verdad Gallardo

Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Verdad Gallardo

Mercedes EQS Gets A Major Update: Everything You Need to Know

Verdad Gallardo

5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Verdad Gallardo

Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Verdad Gallardo

10 Most Reliable Mercedes-Benz Models You Can Buy Used

Verdad Gallardo

Apr 13, 2017 | 08:08 AM

#159

longbow0404

Senior Member

Joined: Dec 2009

Posts: 411

Likes: 37

From: Miami

2019 E63s

I did it the first week of owning my sedan; I haven't done it on the cabrio.
I could do a video of both if guys want in order to hear the difference

let me know

Apr 13, 2017 | 08:23 AM

#160

skim7x

MBWorld Fanatic!

Joined: Jan 2017

Posts: 1,117

Likes: 182

Mercedes-Benz E63s AMG

Would love a video of both... Which do you prefer? Sound wise?

Apr 13, 2017 | 08:35 AM

#161

longbow0404

Senior Member

Joined: Dec 2009

Posts: 411

Likes: 37

From: Miami

2019 E63s

To be honest from the driver seat the sound is not that different. Maybe because the cabriolet is open and has no actual roof. But the sedan sounds a little louder once on boost

Apr 13, 2017 | 10:52 AM

#162

shoe3k

Member

Joined: May 2015

Posts: 168

Likes: 25

From: ?

nothing

Quote:

Originally Posted by Vic55

Both my C63S and GTS are stock with the performance exhaust--- the level of sound is very close with the GTS slightly louder due to shorter distance piping. I would guess with the second cat pull on a C63S would push that car much closer to the OEM sound of the GTS with the exhaust flaps wide open.

Edit, my GTS is tuned and Weistec was able to tweak the software for more overrun and battleship pops but stock its still louder.

You have to remember, removing the secondary CAT will not only increase volume but will change the sound compared to stock. Some people will not like the increased higher frequencies. Personally, I love how it sounds with the secondary cat delete.

Apr 13, 2017 | 10:59 AM

#163

WhiteKnight16

Member

Joined: Dec 2016

Posts: 115

Likes: 14

2008 BMW M3, 2017 C63s Coupe, 2015 S550, 2018 E63s

I live in Dallas and will be doing this mod today after work. I plan on going to a shop in Denton, which has worked on a lot of muscle cars as well as cars like ours. My buddies have nothing but positive reviews about this place, so I am optimistic that everything will go well as the job should be pretty easy. I will try to post a before and after video once I get the cats cut.

Apr 13, 2017 | 11:16 AM

#164

darwin329

Thread Starter

Super Member

Joined: Jun 2015

Posts: 927

Likes: 33

From: San jose CA.

w205 c400 c63s

Quote:

Originally Posted by Alex98

Just did it yesterday and sounds mean! Worth it if you're not wanting to drop 3k+ on a tune catless downpipe

Hey mate did hows the secondary cat delete so far? You dont need tune right? No lights on just confirming. Also, you have the perf exhaust too..

Apr 13, 2017 | 12:10 PM

#165

Vic55

Administrator

Joined: Nov 2001

Posts: 12,263

Likes: 901

From: THE Orange County, California

2024 C8 Z06- 2025 BMW CS- 2022 Porsche 992 GTS

Quote:

Originally Posted by shoe3k

You have done this? Any clips? My post above was more along the lines of sound increase (decibels) vs pitch and tone changes. From the posters here who have done it; they state its more of the same.

Apr 13, 2017 | 12:57 PM

#166

AMG 17GT

MBWorld Fanatic!

Joined: Mar 2006

Posts: 4,005

Likes: 711

From: ATLANTA

R Nine T

Quote:

Originally Posted by Vic55

You have done this? Any clips? My post above was more along the lines of sound increase (decibels) vs pitch and tone changes. From the posters here who have done it; they state its more of the same.

Definitely more of same on GT Vic, but an octave lower here.

Also when valve closed there is a funkier idle that I dig.

Apr 13, 2017 | 03:57 PM

#167

FDNewbie

Super Member

Joined: Oct 2015

Posts: 908

Likes: 133

From: Tampa, FL

'17 AMG S63 Convertible, '17 AMG C63S Edition 1 Coupe

To those who have already done this mod, did everyone just cut out the secondary cat and weld a straight pipe in it's place? Or did anyone have the shop create a flange so you can swap the stock secondary cat back in place if need be?

Apr 13, 2017 | 09:24 PM

#168

shoe3k

Member

Joined: May 2015

Posts: 168

Likes: 25

From: ?

nothing

Quote:

Originally Posted by Vic55

You have done this? Any clips? My post above was more along the lines of sound increase (decibels) vs pitch and tone changes. From the posters here who have done it; they state its more of the same.

No. I heard one at the dealer and noticed that it was louder but had a sharper sound through the rpm range. He had performance exhaust and the secondary cat delete done from what he told me.

I did find a video here that sounded similar.

Apr 15, 2017 | 03:11 AM

#169

kuba.95

Super Member

Joined: Jul 2013

Posts: 825

Likes: 15

From: Edmonton Alberta Canada

Mercedes-AMG C63S Edition 1

Quote:

Originally Posted by shoe3k

That's my car haha, and I posted that video along with 2 others earlier in this threat I think.

Apr 28, 2017 | 05:27 PM

#170

1 SIC DR

Member

Joined: Mar 2017

Posts: 167

Likes: 30

2017 Benz C63S Coupe

Hey guys,

I had my car up, and was looking for the secondary cats on my 2017 C63s coupe with the performance exhaust. Is it at bottom of the down pipes ?
Thanks for any input....

Marco

Apr 28, 2017 | 07:46 PM

#171

rbohgan

Member

Joined: Mar 2015

Posts: 198

Likes: 22

c63s sedan

Quote:

Originally Posted by 1 SIC DR

Hey guys,

I had my car up, and was looking for the secondary cats on my 2017 C63s coupe with the performance exhaust. Is it at bottom of the down pipes ?
Thanks for any input....

Marco

look at previous posts in this thread. itll show a diagram. but yes at bottom of downpipes.

May 7, 2017 | 08:05 PM

#172

Sanch

MBWorld Fanatic!

Joined: Sep 2015

Posts: 2,137

Likes: 263

From: Sydney

AMG GLC63 E-Performance Edition 1

Not the best video but it shows how loud the pop/bangs are

May 7, 2017 | 08:58 PM

#173

digitalnav

Senior Member

Joined: Apr 2017

Posts: 490

Likes: 29

From: California

C63S Sedan

Does the resonator or secondary cat delete cause any drone wit cruising? I did a resonator delete back on on my 5 series BMW and it would drone when cruising at 75 mph on the highway.

May 7, 2017 | 09:37 PM

#174

C63SEd1

Junior Member

Joined: Dec 2016

Posts: 61

Likes: 13

2017 C63S Convertible

Quote:

Originally Posted by digitalnav

Does the resonator or secondary cat delete cause any drone wit cruising? I did a resonator delete back on on my 5 series BMW and it would drone when cruising at 75 mph on the highway.

I've had it done for about 2 months and no drone at all