Originally Posted by rekrul

Anyone in South Florida Miami/Ft Lauderdale to this and have a shop they could recommend?

Originally Posted by Bahnstormer

Yes - G Exhaust in Davie near the Hard Rock.
They installed AMG E55 mufflers on my E500 and did the bumper cutouts.
Great work at a very reasonable cost.
Ask for 'G' and tell him the E500 Mercedes guy referred you.

http://gexhaust.com/

Originally Posted by kuba.95

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

Originally Posted by Andyroo

Right, after finding someone to actually do the secondary cat delete, here are my thoughts (I have the non-perf exhaust):

- Zero drone. Non-perf exhaust is as quiet as standard on on the freeway/motorway. Can't hear it.

- A touch louder on idle to normal throttle than stock, but only a touch. On mid to full throttle, however, it's LOUD. This is great for the non-perf exhaust especially because it means driving around normally isn't offensive, but when you start opening the throttle, you can make some ridiculous noises. It's like two cars in one.

- Throatier tone. As standard, I couldn't hear the exhaust through tunnels despite it being pretty loud. With the secondary cats gone, the tone is throatier (not raspier!) and so now through tunnels it sounds amazing. I was shocked how loud it was and how good it sounded, really hard-edged and a lot more like the previous C63.

- Pops and crackles. Before, they sounded like firecrackers. Now they sound like fireworks. Standing behind the car, they punch you in the stomach when they go off. Combined with the engine sound update, this exhaust mod sounds absolutely mental.

In short, it's the perfect mod. Everyone should do it.

Originally Posted by tonylauno1

Hi,

Did you have a H or X pipe where the secondary cat is ?

Originally Posted by AMGC

For anyone looking for a lil extra sound equal to a sec. cat+res delete on the M156 for few hundred dollars that legit takes 1 minute to install thats undetectable by dealerships, I highly recommend and exhaust module if you have the PE. Comfort mode isn't silent, get a nice deep tone w/ some pops and S+ crackles+pops are loud AF. Get a nice pop on start up in comfort with PE button off(louder w/ each mode up+H pipe flap open). Can put to stock setting but can also make extra quiet if you want to be quiet, which is nice if my niece is in the backseat and asleep.

Originally Posted by nslac

Just wondering if any 2019+ owners have been game enough to delete secondary cats?

Originally Posted by Owen Au

I own a 2015 C63 WITHOUT Performance Exhaust. Just wondering how will the sound be after removing the secondary cat.

Originally Posted by Peterk81

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.

Originally Posted by Andyroo

Right, after finding someone to actually do the secondary cat delete, here are my thoughts (I have the non-perf exhaust):

- Zero drone. Non-perf exhaust is as quiet as standard on on the freeway/motorway. Can't hear it.

- A touch louder on idle to normal throttle than stock, but only a touch. On mid to full throttle, however, it's LOUD. This is great for the non-perf exhaust especially because it means driving around normally isn't offensive, but when you start opening the throttle, you can make some ridiculous noises. It's like two cars in one.

- Throatier tone. As standard, I couldn't hear the exhaust through tunnels despite it being pretty loud. With the secondary cats gone, the tone is throatier (not raspier!) and so now through tunnels it sounds amazing. I was shocked how loud it was and how good it sounded, really hard-edged and a lot more like the previous C63.

- Pops and crackles. Before, they sounded like firecrackers. Now they sound like fireworks. Standing behind the car, they punch you in the stomach when they go off. Combined with the engine sound update, this exhaust mod sounds absolutely mental.

In short, it's the perfect mod. Everyone should do it.

Originally Posted by rdrrua

Crap - my 2019 c63 is quiet as my girlfriend during sex. It has something to do new particles filter.

Anybody did secondary cat delete on a 2019+ C63s? Does it help at all?

1. Where is it located? How can I delete or replace it?
2. Is replacement of an H- or X-pipe going to make sound any better?
3. Secondary cat can only be cut off? There is no way to just replace it with a straight pipe?

Originally Posted by tobeit

🤭 wait what, you want your girlfriend to sound like a burbling V8 and maybe have some pops and bangs 🤓

Originally Posted by rdrrua

not even a burble, man! heck with the girlfriend, I am so disappointed with this car. The sound I thought she makes was like 80% of the reason I chose it (same with the girlfriend!). Would have gone for something like supercharged Jaguar F-type then. Jags sound never disappoints.

Originally Posted by Wolfman

Changed thread title from "Resonator removal on C63s Perf Exhaust" to "Secondary Cat delete on C63s Perf Exhaust"