CL55 AMG, CL65 AMG, CL63 AMG (C215, C216) 2000 - 2014 (Two Generations)

Gutted Cats or Downpipes

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 08-28-2014, 01:10 PM
  #1  
MBWorld Fanatic!
Thread Starter
 
V12Godspeed's Avatar
 
Join Date: Mar 2004
Location: South FL & NYC
Posts: 5,768
Received 4 Likes on 4 Posts
Your worst nightmare...
Gutted Cats or Downpipes

I am thinking of either removing the cats completely or Gutting them internally and leaving them in place. What are people doing these days? Thanx
Old 08-28-2014, 03:05 PM
  #2  
Super Member
 
V12TTenthusiast's Avatar
 
Join Date: Jul 2013
Posts: 930
Likes: 0
Received 24 Likes on 21 Posts
06 SL65AMG, 13 Tesla Model S 60kwh, 02 Jaguar S-Type 3.0, 12 S550 4 Matic, 07 E320 Bluetec, 06 LX470
I got 3 Inch Catless on mine, but my whole exhaust is custom made 3 inch all the way around
Old 08-28-2014, 03:45 PM
  #3  
Former Vendor of MBWorld
iTrader: (1)
 
shardul's Avatar
 
Join Date: May 2008
Location: Houston
Posts: 12,139
Received 293 Likes on 242 Posts
2003 W211 E55, 2003 W220 S600
cut the cats out and weld a 3" pipe in place with 02 bungs
Old 08-28-2014, 04:52 PM
  #4  
MBWorld Fanatic!
 
RaceHorse's Avatar
 
Join Date: Jan 2011
Posts: 1,179
Likes: 0
Received 55 Likes on 50 Posts
CL65
Originally Posted by shardul
cut the cats out and weld a 3" pipe in place with 02 bungs

This above, or downpipes... Ask yourself, "will there be a time and place where they are needed for emissions?" I'd find a decent exhaust place and have downpipes made in house. I think its difficult for real accurate fitment without the car on site. In the end the price will be about the same. Also, you will need to ditch the stock airboxes if you already haven't. My car ran out of breath in the higher RPMs, spitting out the exhaust faster than it could draw air in. While you are at it, are you going to remove the flat spot towards the back where the support is located? I kinda wish I had, I'm sure its not a big difference, but it just looks bad after everything else is nice and big.

Last edited by RaceHorse; 08-28-2014 at 04:54 PM.
Old 08-28-2014, 04:55 PM
  #5  
MBWorld Fanatic!
Thread Starter
 
V12Godspeed's Avatar
 
Join Date: Mar 2004
Location: South FL & NYC
Posts: 5,768
Received 4 Likes on 4 Posts
Your worst nightmare...
Originally Posted by RaceHorse
This above, or downpipes... Ask yourself, "will there be a time and place where they are needed for emissions?" I'd find a decent exhaust place and have downpipes made in house. I think its difficult for real accurate fitment without the car on site. In the end the price will be about the same. Also, you will need to ditch the stock airboxes if you already haven't. My car ran out of breath in the higher RPMs, spitting out the exhaust faster than it could draw air in. While you are at it, are you going to remove the flat spot towards the back where the support is located? I kinda wish I had, I'm sure its not a big difference, but it just looks bad after everything else is nice and big.
Yep, got an intake system. Once engine goes down, will do the downpipes as well. Thx
Old 09-03-2014, 02:13 PM
  #6  
MBWorld Fanatic!
Thread Starter
 
V12Godspeed's Avatar
 
Join Date: Mar 2004
Location: South FL & NYC
Posts: 5,768
Received 4 Likes on 4 Posts
Your worst nightmare...
Can someone suggest a simulator or any kind of trickery to trick the CEL? I will get tuned once everything is done. Thx
Old 09-03-2014, 02:15 PM
  #7  
Super Member
 
V12TTenthusiast's Avatar
 
Join Date: Jul 2013
Posts: 930
Likes: 0
Received 24 Likes on 21 Posts
06 SL65AMG, 13 Tesla Model S 60kwh, 02 Jaguar S-Type 3.0, 12 S550 4 Matic, 07 E320 Bluetec, 06 LX470
I used those 90 degree elbow 02 simulators off vivid racing, did the trick
Old 09-03-2014, 02:17 PM
  #8  
MBWorld Fanatic!
 
Dr Matt's Avatar
 
Join Date: Aug 2013
Location: Anchorage
Posts: 1,077
Received 78 Likes on 64 Posts
05 CL65
Tuner should be able to turn off rear O2's in the tune. Not a good idea to drive around with all the mods you have planned without a tune so just have them do that in the initial tune.
Old 09-03-2014, 02:21 PM
  #9  
MBWorld Fanatic!
Thread Starter
 
V12Godspeed's Avatar
 
Join Date: Mar 2004
Location: South FL & NYC
Posts: 5,768
Received 4 Likes on 4 Posts
Your worst nightmare...
Originally Posted by Dr Matt
Tuner should be able to turn off rear O2's in the tune. Not a good idea to drive around with all the mods you have planned without a tune so just have them do that in the initial tune.
She will get tuned for sure, Thx

Originally Posted by V12TTenthusiast
I used those 90 degree elbow 02 simulators off vivid racing, did the trick
Great Thanks.
Old 09-03-2014, 02:23 PM
  #10  
Super Member
 
V12TTenthusiast's Avatar
 
Join Date: Jul 2013
Posts: 930
Likes: 0
Received 24 Likes on 21 Posts
06 SL65AMG, 13 Tesla Model S 60kwh, 02 Jaguar S-Type 3.0, 12 S550 4 Matic, 07 E320 Bluetec, 06 LX470
Taking it off tune isn't 100%, I had Jerry do mine and it still popped up time to time, to get rid of it for sure I had to do those 02 simulators to top of what Jerry did in the tune
Old 09-03-2014, 02:25 PM
  #11  
MBWorld Fanatic!
Thread Starter
 
V12Godspeed's Avatar
 
Join Date: Mar 2004
Location: South FL & NYC
Posts: 5,768
Received 4 Likes on 4 Posts
Your worst nightmare...
Do you have the link? Cant seem to find it. Thx
Old 09-03-2014, 02:31 PM
  #12  
Super Member
 
V12TTenthusiast's Avatar
 
Join Date: Jul 2013
Posts: 930
Likes: 0
Received 24 Likes on 21 Posts
06 SL65AMG, 13 Tesla Model S 60kwh, 02 Jaguar S-Type 3.0, 12 S550 4 Matic, 07 E320 Bluetec, 06 LX470
My bad it wasn't vivid racing it was summit racing this is the link

http://www.summitracing.com/parts/vp...FQQT7Aodr1gARw
Old 09-03-2014, 02:36 PM
  #13  
MBWorld Fanatic!
Thread Starter
 
V12Godspeed's Avatar
 
Join Date: Mar 2004
Location: South FL & NYC
Posts: 5,768
Received 4 Likes on 4 Posts
Your worst nightmare...
Originally Posted by V12TTenthusiast
My bad it wasn't vivid racing it was summit racing this is the link

http://www.summitracing.com/parts/vp...FQQT7Aodr1gARw
Thanks a lot.
Old 09-03-2014, 02:37 PM
  #14  
Super Member
 
V12TTenthusiast's Avatar
 
Join Date: Jul 2013
Posts: 930
Likes: 0
Received 24 Likes on 21 Posts
06 SL65AMG, 13 Tesla Model S 60kwh, 02 Jaguar S-Type 3.0, 12 S550 4 Matic, 07 E320 Bluetec, 06 LX470
You'll prob need to get 2 of them 1 for each side and when you use the washers, I think I used the middle size of the set of 3
Old 09-03-2014, 04:34 PM
  #15  
MBWorld Fanatic!
 
RaceHorse's Avatar
 
Join Date: Jan 2011
Posts: 1,179
Likes: 0
Received 55 Likes on 50 Posts
CL65
I have the 90's also. I have NOT had the tune adjusted for the 02s running without the cats. Under normal hard pulls the light doesn't go on. If I do a long highway pull I will get the CEL even with the elbows. It happened even easier with the stock air boxes. If You haven't done anything yet I'd consider having an extra bung welded in place for data logging.
Old 09-03-2014, 04:41 PM
  #16  
MBWorld Fanatic!
Thread Starter
 
V12Godspeed's Avatar
 
Join Date: Mar 2004
Location: South FL & NYC
Posts: 5,768
Received 4 Likes on 4 Posts
Your worst nightmare...
Originally Posted by RaceHorse
I have the 90's also. I have NOT had the tune adjusted for the 02s running without the cats. Under normal hard pulls the light doesn't go on. If I do a long highway pull I will get the CEL even with the elbows. It happened even easier with the stock air boxes. If You haven't done anything yet I'd consider having an extra bung welded in place for data logging.
Thanks. Yes, will be putting in an A/F logger.
Old 10-30-2014, 03:37 AM
  #17  
Member
 
adamls2's Avatar
 
Join Date: May 2010
Location: florida
Posts: 154
Likes: 0
Received 0 Likes on 0 Posts
W215 CL65
Does anyone have the speeddriven cat-less downpipes, or any other cat-less setup for that matter? I'm very curious to hear the sound difference vs stock. Really want to pair this with my muffler delete. Would appreciate any input!
Old 10-30-2014, 09:30 AM
  #18  
Junior Member
 
eaks's Avatar
 
Join Date: Dec 2013
Posts: 70
Likes: 0
Received 0 Likes on 0 Posts
2005 CL65
I have the speed driven catless downpipes and am super happy with them. I originally told the shop to cut my mufflers off but they called me after they had the downpipes on and said they would recommend keeping them on as it really changed the sound already. I went and fired it up and love the sound with my mufflers still on.. Sounds deadly at startup, a nice rumble at idle and when you get into it it sounds great and the best part is there is no drone at highway speeds..
Old 10-30-2014, 10:06 AM
  #19  
Former Vendor of MBWorld
iTrader: (1)
 
shardul's Avatar
 
Join Date: May 2008
Location: Houston
Posts: 12,139
Received 293 Likes on 242 Posts
2003 W211 E55, 2003 W220 S600
Originally Posted by adamls2
Does anyone have the speeddriven cat-less downpipes, or any other cat-less setup for that matter? I'm very curious to hear the sound difference vs stock. Really want to pair this with my muffler delete. Would appreciate any input!
i have catless setup with no muffler and it is real loud. I plan on putting the mufflers back on
Old 10-30-2014, 09:46 PM
  #20  
Member
 
adamls2's Avatar
 
Join Date: May 2010
Location: florida
Posts: 154
Likes: 0
Received 0 Likes on 0 Posts
W215 CL65
Thanks for the input guys. I'm assuming the catless dp is similar to the muffler delete effect.

Shardul, i'd love to hear a sound clip or something! It's hard for me to have too loud of a setup, haha. How loud would you say it is insude the car, compared to just the muffler delete? ( if you had it like that before the catless)

Thanks!
Old 10-31-2014, 04:41 AM
  #21  
MBWorld Fanatic!
 
RaceHorse's Avatar
 
Join Date: Jan 2011
Posts: 1,179
Likes: 0
Received 55 Likes on 50 Posts
CL65
I think the hard part is exhaust mods on the V12TT just make it a little louder without any change in tone. Sound clips don't do any justice it needs to be heard/experienced in person. Its a smoother firing pattern than a V8 so you won't get the same throaty sound that you hear from a V8 with an exhaust. That's a huge part of the appeal to me. These cars are very unassuming, silent killers to many cars on the road.

Last edited by RaceHorse; 11-04-2014 at 09:56 AM.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Gutted Cats or Downpipes



All times are GMT -4. The time now is 07:18 PM.