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How can I make the sound louder without headers?

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Old Aug 27, 2009 | 04:53 PM
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How can I make the sound louder without headers?
I want the louder sound that can come with adding high flow cats + headers but do not want to add headers yet (only 2500 miles). I am looking to do a ECU tune very soon but I would also like to make the sound louder (stock sound). I've called Kleemann and they said their high flow cats only work with their headers. Is there a simple exhaust mod that I can do to make my sound loud while I fully break my car in before adding headers?
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Old Aug 27, 2009 | 05:24 PM
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straight pipe
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Old Aug 27, 2009 | 05:32 PM
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^^^^^^ in place of the secondary cats located midway down the vehicle
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Old Aug 27, 2009 | 06:14 PM
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Who makes straight pipes for the c63? Does this require some cutting/welding? And when I decide to add headers and high flow cats later down the road, would there be any issues such as fitment or more cutting and welding needed?
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Old Aug 27, 2009 | 06:17 PM
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my car is as loud as it gets with out headers. click on the link if you want lot of vids.
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Old Aug 27, 2009 | 07:10 PM
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Originally Posted by mthis
my car is as loud as it gets with out headers. click on the link if you want lot of vids.


and what exactly have you done?
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Old Aug 27, 2009 | 07:32 PM
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Originally Posted by LP560-4
and what exactly have you done?
2nd cat delete and resonators deleted
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Old Aug 27, 2009 | 08:20 PM
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Originally Posted by LP560-4
Who makes straight pipes for the c63? Does this require some cutting/welding? And when I decide to add headers and high flow cats later down the road, would there be any issues such as fitment or more cutting and welding needed?
These are not in the proximity of the manifolds and primary cats. There are no O2 sensors involved either. Just in front of the resonator, they are side by side and can be cut out and straight pipe welded into place. This pic of the exhaust that I am selling shows the deletion clearly just past the elbow at the opposite end from the cats(left).

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Old Aug 28, 2009 | 02:50 AM
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What is the piping size of the stock oem exhaust on the C63?
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Old Aug 28, 2009 | 03:05 AM
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Originally Posted by mthis
2nd cat delete and resonators deleted

I'm sorry but are they the same thing? Does putting in straight pipes mean removing the resonator?
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Old Oct 29, 2009 | 01:01 PM
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I wish I could delete my secondary cats like this.. Anything like this would undoubtedly void the warranty over here!
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Old Oct 29, 2009 | 05:52 PM
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Originally Posted by LP560-4
I'm sorry but are they the same thing? Does putting in straight pipes mean removing the resonator?
The exhaust goes as follows:
Headers => Primary Cats => Secondary Cats => Resonator => Muffler...

To make the car louder, just remove the Secondary Cats + the Resonator. The stock pipes are 2.75", so you can either use the same size straight pipes or upgrade to 3".... Most shops do 3" anyway, at least here where I'm from...
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Old Oct 29, 2009 | 08:02 PM
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W204
Well also depends what kind of sound you are looking for...

I kept my resonator and mine sounds like this...

http://www.youtube.com/watch?v=BWc3vq9SCQA

That with 3" pipes, cats are out

X pipe where 2nd cats are
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Old Oct 29, 2009 | 10:32 PM
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C63 AMG Arctic w/ Stage 1 Tune, DoubleXX pipe, MCD-631X coming soon
We make a Single X R1 that is a Resonator removal X-pipe. Sorry, ruthless plug LOL. http://boostedbimmers.com/shop/produ...Single-X-R1%22
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Old Oct 30, 2009 | 03:12 AM
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Originally Posted by Jeffield
Well also depends what kind of sound you are looking for...

I kept my resonator and mine sounds like this...

http://www.youtube.com/watch?v=BWc3vq9SCQA

That with 3" pipes, cats are out

X pipe where 2nd cats are


How do they compare to straight pipes?
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Old Oct 30, 2009 | 03:13 AM
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Originally Posted by Brian GT PRO
We make a Single X R1 that is a Resonator removal X-pipe. Sorry, ruthless plug LOL. http://boostedbimmers.com/shop/produ...Single-X-R1%22


Does your X pipe for the c63 sound like Jeffield's above? What is the difference from just adding straight pipes?

Also, I see you are located in Fullerton, do you have the X pipes in stock? Can I pick them up if I were to purchase them?
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Old Oct 30, 2009 | 03:35 AM
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I thought we had 2.5"pipes
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Old Oct 30, 2009 | 12:01 PM
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Originally Posted by CPD SLK
I thought we had 2.5"pipes
I believe we do have 2.5" pipes.
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Old Oct 30, 2009 | 12:57 PM
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My CLS63 has 2.75" pipes... I assumed the exhaust would be the same.. My bad then...
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