Renntech Exhaust valve module
MBWorld Fanatic!
Joined: Dec 2019
Posts: 1,511
Likes: 424
From: Florida
AMG C63s
There are many threads about it, Yes, many did. Yes, it changes the sound at low RPM as exhaust valves are 100% open.
PS: lately, with the valves open and in comfort mode at low RPM slowing down I get what I would call mini "pops"..maybe more like burps.
PS: lately, with the valves open and in comfort mode at low RPM slowing down I get what I would call mini "pops"..maybe more like burps.
Member
Joined: Oct 2016
Posts: 211
Likes: 56
2020 C63s Coupe
On facelift C63s (stock), I can hear more rumble when car is standstill, but that is about it.
Once car starts moving, difference between running EVM vs. stock car in Sport+ mode not too noticeable.
However, I recently got catted downpipe. This matched with EVM is really good.
Personally, I wouldn’t recommend spending $600 on exhaust valve controller on stock car.
If you plan to get downpipe in the future, then just get it now since Renntech has black friday discount on it.
Once car starts moving, difference between running EVM vs. stock car in Sport+ mode not too noticeable.
However, I recently got catted downpipe. This matched with EVM is really good.
Personally, I wouldn’t recommend spending $600 on exhaust valve controller on stock car.
If you plan to get downpipe in the future, then just get it now since Renntech has black friday discount on it.
Thread Starter
MBWorld Fanatic!
Joined: Feb 2017
Posts: 1,126
Likes: 194
Final Edition C63s / RS3 Sportback
Thanks for the info
Thread Starter
MBWorld Fanatic!
Joined: Feb 2017
Posts: 1,126
Likes: 194
Final Edition C63s / RS3 Sportback
On facelift C63s (stock), I can hear more rumble when car is standstill, but that is about it.
Once car starts moving, difference between running EVM vs. stock car in Sport+ mode not too noticeable.
However, I recently got catted downpipe. This matched with EVM is really good.
Personally, I wouldn’t recommend spending $600 on exhaust valve controller on stock car.
If you plan to get downpipe in the future, then just get it now since Renntech has black friday discount on it.
Once car starts moving, difference between running EVM vs. stock car in Sport+ mode not too noticeable.
However, I recently got catted downpipe. This matched with EVM is really good.
Personally, I wouldn’t recommend spending $600 on exhaust valve controller on stock car.
If you plan to get downpipe in the future, then just get it now since Renntech has black friday discount on it.
Super Member
Joined: May 2011
Posts: 883
Likes: 72
From: Vancouver
2018 e63s edition 1
Honestly if you're pre face lift (not sure if fl one's ever got made) and not going to do downpipes, just do the AWE simulators for 50 bucks. The exhaust will always be 100% open without being able to close it, but on a stock exhaust it won't be too obnoxious.
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Junior Member
Joined: Nov 2020
Posts: 28
Likes: 0
From: Charlotte, NC
2018 C63 AMG
Junior Member
Joined: Feb 2018
Posts: 24
Likes: 5
From: PDX
2018 C63S, 2020 GLE580
I got one maybe 2 months ago and installed it on my 2018 sedan with PE (obviously). I think the sound is great in comfort and at low speed. Makes driving around slowly much more entertaining. Also sound is different tone with 100% open valves, maybe a tiny bit deeper and more raw from outside. When in Sport and Sport + I think it’s louder across the rev band. Maybe it’s just me, but I think it makes a difference in spirited and slow comfort mode driving. The more I use it the more I like it. That being said, I don’t run open most of the time (30/70 closed/open) because it’s my commuter and frankly I don’t need the attention running around town.
pricey but fun, comfort or sport modes. I think you’ll like it unless you’re looking for a ton more volume. As people say, it adds volume at idle and from 0-3000 rpm mostly.
Peter
pricey but fun, comfort or sport modes. I think you’ll like it unless you’re looking for a ton more volume. As people say, it adds volume at idle and from 0-3000 rpm mostly.
Peter
Thread Starter
MBWorld Fanatic!
Joined: Feb 2017
Posts: 1,126
Likes: 194
Final Edition C63s / RS3 Sportback
I got one maybe 2 months ago and installed it on my 2018 sedan with PE (obviously). I think the sound is great in comfort and at low speed. Makes driving around slowly much more entertaining. Also sound is different tone with 100% open valves, maybe a tiny bit deeper and more raw from outside. When in Sport and Sport + I think it’s louder across the rev band. Maybe it’s just me, but I think it makes a difference in spirited and slow comfort mode driving. The more I use it the more I like it. That being said, I don’t run open most of the time (30/70 closed/open) because it’s my commuter and frankly I don’t need the attention running around town.
pricey but fun, comfort or sport modes. I think you’ll like it unless you’re looking for a ton more volume. As people say, it adds volume at idle and from 0-3000 rpm mostly.
Peter
pricey but fun, comfort or sport modes. I think you’ll like it unless you’re looking for a ton more volume. As people say, it adds volume at idle and from 0-3000 rpm mostly.
Peter
Junior Member
Joined: Oct 2023
Posts: 25
Likes: 1
GLC 63S
I got one maybe 2 months ago and installed it on my 2018 sedan with PE (obviously). I think the sound is great in comfort and at low speed. Makes driving around slowly much more entertaining. Also sound is different tone with 100% open valves, maybe a tiny bit deeper and more raw from outside. When in Sport and Sport + I think it’s louder across the rev band. Maybe it’s just me, but I think it makes a difference in spirited and slow comfort mode driving. The more I use it the more I like it. That being said, I don’t run open most of the time (30/70 closed/open) because it’s my commuter and frankly I don’t need the attention running around town.
pricey but fun, comfort or sport modes. I think you’ll like it unless you’re looking for a ton more volume. As people say, it adds volume at idle and from 0-3000 rpm mostly.
Peter
pricey but fun, comfort or sport modes. I think you’ll like it unless you’re looking for a ton more volume. As people say, it adds volume at idle and from 0-3000 rpm mostly.
Peter
Junior Member
Joined: Dec 2023
Posts: 45
Likes: 12
From: California
C63 S AMG
Member
Joined: Apr 2017
Posts: 185
Likes: 36
From: San Diego
C63S Coupe/CLA45
I just installed one on my 20 Coupe with 6300 miles and now the flaps rattle at hard acceleration which makes it sound terrible. Tried the grease fix but it starts to happen when grease dries up. Will try another higher temp grease
Junior Member
Joined: Oct 2023
Posts: 25
Likes: 1
GLC 63S
Member
Joined: Apr 2017
Posts: 185
Likes: 36
From: San Diego
C63S Coupe/CLA45
I suspect I might have this as well, as I hear a bit of a flutter type sound under hard acceleration. Is that the sound you’re hearing? I didn’t come across this being an issue here on the forum, hoping it’s not exactly a common one as I did not think there was an adverse consideration to make before getting this installed!
Junior Member
Joined: Apr 2024
Posts: 31
Likes: 3
2020 C63s coupe
I suspect I might have this as well, as I hear a bit of a flutter type sound under hard acceleration. Is that the sound you’re hearing? I didn’t come across this being an issue here on the forum, hoping it’s not exactly a common one as I did not think there was an adverse consideration to make before getting this installed!
ya i gog a 2020 c63s coupe and also sounds like a little fluttering when im on fully throttle but only when starting from 3,000rpm usually in 3rd gear i notice it
Junior Member
Joined: Oct 2023
Posts: 25
Likes: 1
GLC 63S
I am going to bring the car to the workshop to get it checked out but wanted to check if there was some easy diy fix before bringing it down.
Member
Joined: Apr 2017
Posts: 185
Likes: 36
From: San Diego
C63S Coupe/CLA45
Junior Member
Joined: Oct 2023
Posts: 25
Likes: 1
GLC 63S
I’ll have to read the forums a bit more to see if there are any other fixes.
funny this is, I never noticed the fluttering before I got the ASR exhaust valve module. Seems like the module has triggered the valve to become loose? Was that the same with yourself?
Member
Joined: Apr 2017
Posts: 185
Likes: 36
From: San Diego
C63S Coupe/CLA45
Cools thanks. Keep us posted.
I’ll have to read the forums a bit more to see if there are any other fixes.
funny this is, I never noticed the fluttering before I got the ASR exhaust valve module. Seems like the module has triggered the valve to become loose? Was that the same with yourself?
I’ll have to read the forums a bit more to see if there are any other fixes.
funny this is, I never noticed the fluttering before I got the ASR exhaust valve module. Seems like the module has triggered the valve to become loose? Was that the same with yourself?
