Renntech VS MWM exhaust module
Thread Starter
Member
Joined: Aug 2018
Posts: 80
Likes: 8
2019 E63S Estate
Renntech VS MWM exhaust module
Has anyone had experience with both of these options? I like the fact that the Renntech module can be removed without a trace from MB. The simplicity of the module from MWM seems really appealing though as it can be installed within minutes but may come at a risk for warranty work. Renntech states that the valves are always completely opened when activated but the MWM module doesn't state if the valve still fluctuates like stock depending on throttle position and RPM. Just trying to get advice before making my decision.
Joined: Jul 2006
Posts: 6,760
Likes: 594
From: Seattle
'19 E63S, ‘16 CLS63 RIP, '09 E63 Gone, '06 M5 Gone, '97 Supra TT Gone
I would like to know this as well considering that I have the Renntech module sitting in my garage waiting to be installed.
Junior Member
Joined: Mar 2022
Posts: 16
Likes: 8
E63s Wagon
I have the MWM exhaust module for my 2021 wagon. It does not open the valves 100% at all times like the Renntech module. It basically just keeps you from having to hit the button every time you start the car but does not otherwise change the valve behavior.
I also have their lowering module. Both are very easy to install and uninstall. Don’t think you would have any warranty issue because you can just uninstall before taking to the dealer and easily install again after.
I also have their lowering module. Both are very easy to install and uninstall. Don’t think you would have any warranty issue because you can just uninstall before taking to the dealer and easily install again after.
Joined: Jul 2006
Posts: 6,760
Likes: 594
From: Seattle
'19 E63S, ‘16 CLS63 RIP, '09 E63 Gone, '06 M5 Gone, '97 Supra TT Gone
I have the MWM exhaust module for my 2021 wagon. It does not open the valves 100% at all times like the Renntech module. It basically just keeps you from having to hit the button every time you start the car but does not otherwise change the valve behavior.
I also have their lowering module. Both are very easy to install and uninstall. Don’t think you would have any warranty issue because you can just uninstall before taking to the dealer and easily install again after.
I also have their lowering module. Both are very easy to install and uninstall. Don’t think you would have any warranty issue because you can just uninstall before taking to the dealer and easily install again after.
