[db2022cs]

So I haven't even gotten my car yet but it will have the NPP. I don't plan on swapping out the stock exhaust for a while but I am going crazy waiting to pick up my 2ss 1LE. With the NPP I know that through the different driving modes, the valves will muffle some of the sound. With the Borla, there is a NPP version and a Non NPP version. For the NPP version, is there a "stealth" mode that is quiet and is the cost worth it to have that feature? I live in an apartment complex but I never plan on leaving early in the morning. Is the extra cost worth the sound change or is it loud af during startup/cold start no matter what? Thanks.

[AZIROC]

If you are going to actually use it, there is a noticeable sound difference. I leave mine in track mode. The S-type isn't really loud except on cold starts and when ur on it. Otherwise just idling or cruising it's pretty tame

[db2022cs]

Originally Posted by AZIROC

If you are going to actually use it, there is a noticeable sound difference. I leave mine in track mode. The S-type isn't really loud except on cold starts and when ur on it. Otherwise just idling or cruising it's pretty tame

MY current car has a valved exhaust and there is a massive difference in sound between fully open and "comfort". I try not to be an ass around residential areas and as soon as the sun goes down. But any areas or time that is not that, I like to hear the noises haha. I will most likely be going for the Boral Atak. Thanks for response.

[Mark114]

Originally Posted by db2022cs

MY current car has a valved exhaust and there is a massive difference in sound between fully open and "comfort". I try not to be an ass around residential areas and as soon as the sun goes down. But any areas or time that is not that, I like to hear the noises haha. I will most likely be going for the Boral Atak. Thanks for response.

If you're looking for more sound you might want to check out the Corsa NPP exhaust.

https://www.camaro6.com/forums/showthread.php?t=596456

https://www.camaro6.com/forums/showthread.php?t=608453

[Sephx1]

‘19 and up cars have a louder exhaust than ‘16-‘18’s do. You might find the difference between the stock and S-type is not great enough to justify the expense. This is from experience owning a 2021 SS 1LE and my son’s 2016 SS that we just put a Borla S-type on last week.

The valves are really nice to have. With either exhaust it will be fairly quiet when the valves are closed. Valves will be open on startup with any system unless you shut them every time before you start it up. At least that’s what others have said, I haven’t tried closing them at startup.

[Crushin_LT1]

Originally Posted by Mark114

If you're looking for more sound you might want to check out the Corsa NPP exhaust.

https://www.camaro6.com/forums/showthread.php?t=596456

https://www.camaro6.com/forums/showthread.php?t=608453

I have the Corsa NPP and it is excellent. Deep, throaty, rumbly. Great sound. Rather loud in track/sport, gets quiet in touring/stealth.

[joekd]

I have the ATAK on my SS, the stealth mode is noticeably quieter then the other modes, just remember you need to change to that before shutting your car off the night before otherwise you will still have the loud start until you can access the menu and change it

[KingLT1]

The best thing about the Corsa NPP is the huge difference between open and closed. Fwiw I had one of the first Corsa NPP exhausts built pre Covid. I am on my 3rd set of mufflers because the valve shafts rattle. If the valves didn't rattle the exhaust would be GOLD..... I will say Corsa's warranty department is among the best I have dealt with. So I will continue to work with them. They said they would do whatever I want to make it right. I might swap out to a set of standard Sport mufflers if the 3rd set of mufflers start to rattle. Corsa claims they fixed the shaft rattle by using graphite bushings.

[Mark114]

Originally Posted by joekd

I have the ATAK on my SS, the stealth mode is noticeably quieter then the other modes, just remember you need to change to that before shutting your car off the night before otherwise you will still have the loud start until you can access the menu and change it

If you forget you can press the Start button without pressing the brake pedal until the car goes into “Run” mode. Then you can switch the exhaust to stealth mode.

[KingLT1]

I have my NPP valves tuned so Touring mode starts with valve closed. That way I can put it in track mode for when I want valves open and when I shut car off in Track it defaults to Touring next start up. This way the car will always start with valves closed. #cheatcodes

[Racereddie]

Originally Posted by db2022cs

So I haven't even gotten my car yet but it will have the NPP. I don't plan on swapping out the stock exhaust for a while but I am going crazy waiting to pick up my 2ss 1LE. With the NPP I know that through the different driving modes, the valves will muffle some of the sound. With the Borla, there is a NPP version and a Non NPP version. For the NPP version, is there a "stealth" mode that is quiet and is the cost worth it to have that feature? I live in an apartment complex but I never plan on leaving early in the morning. Is the extra cost worth the sound change or is it loud af during startup/cold start no matter what? Thanks.

You can tell the sound difference between all the modes but nothing outrageous. It is loud in Track mode but it is a stock muffler. The way the system works, you can select the Drive Mode by the switch or the infotainment screen.

If you select Snow/Ice or Track with the switch, the car will shift back to Tour mode when you shut it off. If you select Sport Mode it will start up in Sport Mode. If you use the infotainment screen you can select Engine sound and tell it to remain in a specific sound mode regardless of the switch selection and it will stay that way on even at start up

[ste6000]

Originally Posted by db2022cs

So I haven't even gotten my car yet but it will have the NPP. I don't plan on swapping out the stock exhaust for a while but I am going crazy waiting to pick up my 2ss 1LE. With the NPP I know that through the different driving modes, the valves will muffle some of the sound. With the Borla, there is a NPP version and a Non NPP version. For the NPP version, is there a "stealth" mode that is quiet and is the cost worth it to have that feature? I live in an apartment complex but I never plan on leaving early in the morning. Is the extra cost worth the sound change or is it loud af during startup/cold start no matter what? Thanks.

not sure this helps. this is my SS with ATAK and x-pipe from borla. you can hear when the car shifts from using 4 to 8 cyclinders. not exactly the question you are asking but you can hear the volume differences. maybe i can do one later that does between npp modes as well.