C55 with X-pipe, all 4 cats delete
Thread Starter
Member
Joined: Sep 2013
Posts: 78
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From: Lithuania
'04 C55 AMG
C55 with X-pipe, all 4 cats delete
Does anybody have C55 with all 4 cats deleted and x-pipe putted were resonator should be? All I found is 2 youtube videos and nothing is clear after watching them. I'm scare that it's would be too loud, nascar sound..
I have all 4 cats + resonator deleted now, thinking of x-pipe, please advice guys
I have all 4 cats + resonator deleted now, thinking of x-pipe, please advice guys
Thread Starter
Member
Joined: Sep 2013
Posts: 78
Likes: 7
From: Lithuania
'04 C55 AMG
Senior Member
Joined: Nov 2014
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From: Downingtown, PA
none... for now
There's an underside shot. As you can see, the secondary cats are much further back and parallel with the rest of the exhaust. It requires minimal skill/time to cut from in front of them, back to the muffler pipes, and install piping/X-pipe. The main cats essentially are attached to the exhaust flange, so they'd have to be cut off and reattached, you'd have to replace the down pipe(ing), and need 02 bungs made. Nothing extreme, but time consuming and not worth the added effort to me unless you're doing long tube headers... in which case half of what I said is taken care of with the headers.
Senior Member
Joined: Nov 2014
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From: Downingtown, PA
none... for now
Completely misread that too lol. If it's straight pipe'd now, the volume won't change much at all, as you're not adding anything to muffle/amplify sound. The pitch will probably go up though in the upper rpm range. Less rumble, slightly more scream.
Super Member
Joined: Dec 2007
Posts: 846
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From: ATL
2017 GLS 550
the only point of an x-pipe would be if you are going dual all the way to the back. is that what you are doing. if so I would recommened an X with an H cross just behind it, I have heard that will effectively kill the droning happens at higher speeds. something I am working on doing.
Last edited by thtguy; Apr 11, 2015 at 06:13 PM.
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Thread Starter
Member
Joined: Sep 2013
Posts: 78
Likes: 7
From: Lithuania
'04 C55 AMG
guys, thanks for the replies. But still.. anyone got true straight pipe exhaust with an x-pipe on C55? I want to hear it!
2 videos I found:
and I don't like the sound at all. Maybe because it was filmed in garage or somethin'. Need to listen drive by.
H-Pipe:
but not written cats are in place or not.
2 videos I found:
H-Pipe:
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Member
Joined: Mar 2015
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From: Uk
C55 AMG
From my research on the matter, the best solution for the C55 is to leave the primary cats in place, delete the resonator and replace with a x-pipe and delete the secondary cats. Surely its too loud with no cats at all? Will sound like a chav with a Subaru.
Super Member
Joined: Dec 2007
Posts: 846
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From: ATL
2017 GLS 550
so just to be sure, we understand... you have stock manifolds, with pipes replacing your both sets of cats, going to a y-pipe into a Single straight pipe that replaced your resonator which then goes back to the y split going to your dual mufflers... if I have this wrong please explain in detail... pics if possible.
And as I said previously... X pipe is only useful if going dual all the way back.
And as I said previously... X pipe is only useful if going dual all the way back.
Last edited by thtguy; Apr 14, 2015 at 09:31 AM.
Thread Starter
Member
Joined: Sep 2013
Posts: 78
Likes: 7
From: Lithuania
'04 C55 AMG
so just to be sure, we understand... you have stock manifolds, with pipes replacing your both sets of cats, going to a y-pipe into a Single straight pipe that replaced your resonator which then goes back to the y split going to your dual mufflers... if I have this wrong please explain in detail... pics if possible.
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Posts: 255
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From: Downingtown, PA
none... for now
You won't loose any power whatsoever. Don't buy into any "backpressure" talk, what's important is exhaust scavenging. That happens primarily in the headers, but the X pipe will also help, allowing gases from one cylinder bank to fill up either, rear exhaust pipe. It won't make it louder, just change the pitch.
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2005 C55 AMG
MBWorld Fanatic!
Joined: Mar 2009
Posts: 2,136
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From: GA
2016 Chevrolet SS, 2006 Cadillac STS-V
That was my old car, yes. Someone else is enjoying that exhaust now. Kleemann mid-length headers, Random Technologies 100 cell cats, and fully custom 2.5" stainless steel from there back into the stock mufflers. The car was supercharged before that exhaust and I gained a half of a second in the quarter. It flowed! The rear oxygen sensors were just in standard bungs but they were turned off with STAR in developer mode.
