I had the GM Performance Exhaust installed

[NWLa Now]

Well that's disappointing to hear. Corsa appears to make one for the '25 with 5.3 too.

In retrospect it saved me some decent coin as 9+ months a yr in my AO windows are up w/ AC on so .......

 

[hundhaus]

I have a 2023 6.2 RST performance package with cai, exhaust , big brakes, slick top (no roof rails) and I cannot figure out what exhaust I have or what this flapper does.

 

[jfoj]

Can't tell you for sure what exhaust you have, but the flex coupler is standard on the V8's I have seen. The flapper in the muffler is to counter the awful sound when the DFM kicks in. Not sure if the performance exhaust have this like the standard exhaust. Never seen the bowties on the exhaust tips, this may be something more than a stock exhaust?

Hopefully someone can add to this and fully answer your question.

 

[BacDoc]

I think the bow ties come with the GM performance exhaust system.

 

[iamlegion]

I have a 2023 6.2 RST performance package with cai, exhaust , big brakes, slick top (no roof rails) and I cannot figure out what exhaust I have or what this flapper does. View attachment 464320

Valve regulates the noise during DFM modes otherwise in some transient throttle positions you’d hear a faint chopping sound - akin to a helicopter in the distance.