_AMG_

Just had my resonators taken off today and put straight pipes. I couldn't be happier. It sounds AWESOME!!!!

Sincity

I would have kept the resonators and removed the secondary cats.

LZH

+1

BerBer63

+2,. I removed my resonators for an x-pipe. It was pretty pointless, went back to oem. No worthy gains, just change in the characteristic 63 sound. As dads63 said, do not touch anything from the resonators back, which just shows you how perfectly designed and engineered they made it. Just play with the 1/2 cats and get actual gains out of it.

SMP

+3 .......I could swear you asked the same question about a month ago ......but still ended up deleting the wrong part from the exhaust

_AMG_

I was planing on taking out my 2nd cats but my tech is saying dont even touch it. Im very happy with my decision and don't regret it at all.

SGTzAMG

one way to solve this!!!
ehxuast note vid clip comparing the two

one vid with JUST the resonator deleted and another with JUST the 2ndry kitties deleted.

then, the verdict shall be made.

till then...

this is going nowhere

TTMotorsports

You asked for help from this forum and got actual info from people who did what you asked already(some of us many times)and then listened to your "master MB tech" that shows he knows NOTHING about exhaust efficiency, exhaust pulses, the positive effect of deleting the secondary cats for more power and sound and the highly restrictive factory exhaust design and components.

Enjoy the DRONE!

Try this: Let the 722.9 shift to 7th gear and cruise on the highway @ 65mph.

How's the droning?

obsidian05e55

I removed my res, and i drive constantly back-forth to my office on the highway, and i dont get any of this "drone". I will be removing the sec cats, and replacing with an x-pipe next week.

Sincity

_AMG_

Yes i did ask for help, thanks to all the people that gave me an input. I decided to take off my resonators and add a straight pipes because that's what i wanted to do. I feel happy with my decision and i don't regret it one bit.

I was actually very surprised, there is NO drone in my car what so ever, Just like obsidian05e55 stated. And like i said before, I just wanted a sound improvement. And i don't think your in a position to question the knowledge of a master certified tech at Mercedes who has been working on AMG's for over a decade.

Sincity

I'm not a Mercedes tech either. But, the resonator also acts like a H-pipe; which you effectively removed. Removing the secondary cats would have given you the sound you desire and also increased flow. Take a look at Superlubricity's review and videos of the x-pipe he has that replaced the secondary cats. I think many of us are scratching our heads on the advice that the Master Tech has given you.

AMS Performance

X-pipe is the best all around for both sound quality & performance, only downside is its usually a bit more expensive than straight pipes (although sometimes its cheaper).

_AMG_

I showed my tech the video of superlubricity's x pipe and he said it sounds like stock to him, I thought the same thing. I personally dont think its worth the price. Then i watched obsidian05e55's video and thought to myself "That's the sound ive been looking for!!!" Also, if any one who removed there 2ndary cats, and for some reason they're engine takes a dump, MB will void warranty. This information is coming from someone who works directly for Mercedes.

Even Money

Oh..well, i guess having removed the resonators then, you won't have that problem, seeing as how the resonators actually function to balance the exhaust pulses and the cats are for emissions only.

LZH

obsidian05e55

_AMG_

I dont understand whats soo funny.

obsidian05e55

Just enjoy your car man.. I love the sound of mine, and i get no drone. I will be removing the sec cats and adding an x-pipe in place of them. Ill post up next week when its done.

_AMG_

Thanks dude, i love the sound. And i got absolutely no drone also.

miami1lt

I replaced both sec cats and resonator w/ x-pipe...no drone, but the signature C63 sound is gone...it sounds much more Italian now. Anyway, I like you guys, enjoy my decision...didn't see any gains in power, but love the high-revving and free sound it has now.
While I agree your MB Tech doesn't sound very smart (and Superlubes car does NOT sound stock by ANY means), you did what you wanted...congrats, glad you like your setup!

_AMG_

I love my setup. Very happy with it.

emericr

Can someone in this forum who has time to waste post links to clips of cars that have different set ups (2nd cats removed only, resonators removed only and then both) so that the community can easly listen to all the set ups.
Whoever will do that, please accept my deepest gratitude.

obsidian05e55

Here's mine with just res removed. I'll update when sec cats come out, and x-pipe goes in..

https://mbworld.org/forums/c63-amg-w...r-removal.html

GHAZAN

He is laughing bc you were gullible enough to believe whoever told you that. Deleting 2ndary cats does not = void entire car warranty.