Cats or no cats, that is the question
Super Member
Joined: Dec 2009
Posts: 992
Likes: 2
From: Denver, CO
2008 CLS63 AMG
For my set up I already have the k2. So what i'm doing is cutting out the secondary cats, putting in kleemann high flow cats with 3inch piping. I decided to put in high flow cats just to keep the sound a little more quite.
MBWorld Fanatic!
Joined: May 2008
Posts: 3,077
Likes: 2
2006 E55 AMG
I have Floored Fabbed long tube headers. I'm running no cats, no resonator, x-pipe, and stock mufflers. Everything listed above except the mufflers were provided by FF.
No, but there are a few other that have posted them. Look for threads started by either Chiromikey or AMG Fan.
Who's LT's did you buy? What size tubing do you plan on going with? I have been inside a few cars with 3" exhaust systems and all I could say is "very loud, both outside and in". My biggest fear was the same as yours but Chiromikey reassured me I had nothing to worry about, he was right.
Typically going with LT's and straight pipes you will compromise a little of that MB comfort. IMO it sounds like you might be better off going with some shorty's and keeping the cats and resonator. All though once you hear and feel your beast after the install it will most likely put a great big 
on your face!!!
Good luck and keep us posted!
Do you have any pictures of your exahust system seeing it from under the car?
Im installing right now a set of LT headers, planing to remove all of the CATS, resonators but leaving the stock rear mufflers untouched.
But after reading all this, Im worried to have a lot of sound inside of the car, and that the car would sound like an old tow truck.
But after reading all this, Im worried to have a lot of sound inside of the car, and that the car would sound like an old tow truck.
Does your car sound too loud outside that can be heard blocks away?
How about inside the cabin?
I havent decided what to do and my exahust system is about to get all chop and cut.
I just installed a 180 pulley, 82tb, cf air intake, and a ECU tune for all of this mods, plus NO cats.
Im not planing to race my car on a race track, just want to have a very strong car for the streets, but still want to keeps its Luxury car use and confort.
What would you advice me?
How about inside the cabin?
I havent decided what to do and my exahust system is about to get all chop and cut.
I just installed a 180 pulley, 82tb, cf air intake, and a ECU tune for all of this mods, plus NO cats.
Im not planing to race my car on a race track, just want to have a very strong car for the streets, but still want to keeps its Luxury car use and confort.
What would you advice me?
on your face!!!Good luck and keep us posted!
Senior Member
Joined: Jan 2009
Posts: 285
Likes: 26
'18 AMG GTR, '04 CL55, '04 E55, '03 CLK500, '01 E55,94 E500, '91 190E 2.5-16 EVOII, '86 560SL
I have Floored Fabbed long tube headers. I'm running no cats, no resonator, x-pipe, and stock mufflers. Everything listed above except the mufflers were provided by FF.
No, but there are a few other that have posted them. Look for threads started by either Chiromikey or AMG Fan.
Who's LT's did you buy? What size tubing do you plan on going with? I have been inside a few cars with 3" exhaust systems and all I could say is "very loud, both outside and in". My biggest fear was the same as yours but Chiromikey reassured me I had nothing to worry about, he was right.
Typically going with LT's and straight pipes you will compromise a little of that MB comfort. IMO it sounds like you might be better off going with some shorty's and keeping the cats and resonator. All though once you hear and feel your beast after the install it will most likely put a great big on your face!!!
Good luck and keep us posted!
No, but there are a few other that have posted them. Look for threads started by either Chiromikey or AMG Fan.
Who's LT's did you buy? What size tubing do you plan on going with? I have been inside a few cars with 3" exhaust systems and all I could say is "very loud, both outside and in". My biggest fear was the same as yours but Chiromikey reassured me I had nothing to worry about, he was right.
Typically going with LT's and straight pipes you will compromise a little of that MB comfort. IMO it sounds like you might be better off going with some shorty's and keeping the cats and resonator. All though once you hear and feel your beast after the install it will most likely put a great big
on your face!!!Good luck and keep us posted!
I bought a set of LT headers from Eurocharged, I have a 3" x-pipe. Im not sure if I use a 3" tube or a 2.75".
I know that straight pipes will sound horrible, with the x-pipe will equalize the sound better, but I dont know if it is going to be too much sound.
The ECU was programed to use without cats, so there is no CEL to worry about.
What OE section or what OE cats would you leave in the car??
The primary or secondary cats??... or just the middle resonator?
none of the above?
Thanks again
MBWorld Fanatic!
Joined: Oct 2006
Posts: 1,603
Likes: 0
From: merryland
cornfed gtr and m3
Thanks a lot for all your help.
I bought a set of LT headers from Eurocharged, I have a 3" x-pipe. Im not sure if I use a 3" tube or a 2.75".
I know that straight pipes will sound horrible, with the x-pipe will equalize the sound better, but I dont know if it is going to be too much sound.
The ECU was programed to use without cats, so there is no CEL to worry about.
What OE section or what OE cats would you leave in the car??
The primary or secondary cats??... or just the middle resonator?
none of the above?
Thanks again
I bought a set of LT headers from Eurocharged, I have a 3" x-pipe. Im not sure if I use a 3" tube or a 2.75".
I know that straight pipes will sound horrible, with the x-pipe will equalize the sound better, but I dont know if it is going to be too much sound.
The ECU was programed to use without cats, so there is no CEL to worry about.
What OE section or what OE cats would you leave in the car??
The primary or secondary cats??... or just the middle resonator?
none of the above?
Thanks again
Super Member
Joined: Feb 2005
Posts: 901
Likes: 13
I installed the SuperSprint headers,cat delete pipes and x pipe and my ML63 sounded soooo raspy(ricer) it killed my joy, so i`m going to put back the resonators and hope for a deep sound.oh and i have to turn of the check engine light.
