3.3TT US-Spec 2023 GT2 Bi-Modal Exhaust

[fastoy]

I've seen discussions about the exhaust valves on the Stingers. Most seems to be centered around the pre-2022 models. I have a US specification 2023 GT2. I see that I can affect the sound from the dash's settings but that seems to be mostly feedback from the interior speakers.

I also have a C8 Corvette with the NPP performance exhaust option so I am generally familiar with this system.

I looked under it this morning and saw the valves and the control modules.





Is there any documentation on how these valves affect the exhaust flow through the resonator? And what situations/configurations cause them to be open? I can't tell if the outside sounds are changed by the various driving modes.

One post I read suggested to simply unplug the wire leading to the control module (see yellow arrow). Is there any downside to that? I can't really see the end of the wire. I'm concerned over the connectors getting covered with mud and trash and then being difficult to reconnect. Any ideas on how to protect them? Is there an alternative to disconnecting AT the exhaust tip? Maybe even a separate switch to force them open or closed.

 

[Thomby]

I'm concerned over the connectors getting covered with mud and trash and then being difficult to reconnect. Any ideas on how to protect them?

Saw this post linked from another thread. I believe the valves always default to open at shutdown (mine did anyway), then close after startup. I unplugged the connectors with my car off and tucked them behind a nearby edge of the splash shields so they shouldn't be getting hit with anything.

As for the original logic, I haven't found any documentation, just anecdotal evidence (my own and others') that it's not all or nothing, or strictly in Sport mode. Gear, throttle, rpm, and drive mode all seem to impact it.

 

[jdmvette]

I too have always noticed that my valves are open when the car is off but am not sure what determines how they work.

from a fellow crossed-flags owner