Review of C63 Headers - Moments After Installation

[Peter DLM]

Entertaining read. The best way to mute your exhaust, if needed in future, is to simply add two turbo-chargers.

 

[DuncS3]

I'd like more noise from my new coupe if I'm honest - that's not anything to do with 4.0 vs 6.2 as I had the same desire with my 6.2 where I removed the secondary cats but I'm currently reluctant to chop the exhaust up on this new car.

 

[StephenSJason]

I was detailing an old E55 last week for hours at a friend's garage and I was approached by an owner of a 4.0T C63 who had his rear boxes cut off in order to achieve more noise. He said that he loved the noise but the car felt like it had lost performance and that it hung onto gears in a strange way. I can only assume that the electronic valve, which is now redundant and the connector left hanging, has something to do with it. Perhaps the ECU needs the signal or at least the electrical resistance from the rear exhaust valve; I'm not sure.

Anyway, that's all I could really say to him, and that he should call MSL perhaps as it may need the fact that it now has no valves mapping out with a new ECU tune. I was also horrified that the rear boxes were cut off and said that perhaps he should look to refit those or try, the AMG performance boxes.

I'm not familiar with the underbody of the W205 so I cannot say how the exhaust is sectioned up I.e. Are down-pipes separate to mid-pipe? And at what point do the rear boxes bolt to the mid-pipe? In my opinion, if possible, he would have been better off sticking in a bolt-on non-resonated mid-pipe for example, if he didn't want to have down-pipes installed and the necessary mapping to support those.

Anyway, food for though I suppose if your are a W205 owner.

 

[italian_cls55amg]

Great write up and excellent turn around on how you now feel about the sound. I had my primary decats and resonator box removed on my cls 55 amg. Not the same job as yours but similar feeling after mods had been done. I also felt at the time, wow thats really loud but it wasn't. Turned out to be perfect and has a great raw v8 scream now once you put your foot down. Don't know if you have gone through any tunnels yet but wait until you do, nothing but a big smile will come on your face.



I also live in west sussex, 20 min from Gatwick. Would love to hear your beast. Im also going benz on the green so hopefully if your going i could see it then.

All the best mate.

 

[kopkid]

Does it improve flow and power

 

[StephenSJason]

Great write up and excellent turn around on how you now feel about the sound. I had my primary decats and resonator box removed on my cls 55 amg. Not the same job as yours but similar feeling after mods had been done. I also felt at the time, wow thats really loud but it wasn't. Turned out to be perfect and has a great raw v8 scream now once you put your foot down. Don't know if you have gone through any tunnels yet but wait until you do, nothing but a big smile will come on your face.



I also live in west sussex, 20 min from Gatwick. Would love to hear your beast. Im also going benz on the green so hopefully if your going i could see it then.

All the best mate.

I've missed the boat on the entry list for Benz I think. I'm not sure what parking around the pub is like if you aren't in the field. Happy to meet locally if you fancy going deaf

 

[StephenSJason]

Does it improve flow and power

Yes to both. Before I used the tune for headers, it was noticeably more frantic but I don't have dyno results to quantify the difference.

 

[kopkid]

Yes I want to do headers and remove primary cats,, and resonator,,,, leaving only secondary cats but only if it's worth power gains

 

[sirius9]

Great write up and excellent turn around on how you now feel about the sound. I had my primary decats and resonator box removed on my cls 55 amg. Not the same job as yours but similar feeling after mods had been done. I also felt at the time, wow thats really loud but it wasn't. Turned out to be perfect and has a great raw v8 scream now once you put your foot down. Don't know if you have gone through any tunnels yet but wait until you do, nothing but a big smile will come on your face.



I also live in west sussex, 20 min from Gatwick. Would love to hear your beast. Im also going benz on the green so hopefully if your going i could see it then.

All the best mate.

You can listen to mine instead Same setup as Cozy... in fact one of the first in hampshire region.... I will be at Benz on the Green!