[Chev133]

Hi,
Can someone tell me if I can keep the exhaust note louder but still have it in tour mode? It’s a 2019 ZL1. I’ve been told I can pull a fuse but witch one? I’m not worried about being able to make it quiet, it can stay louder 100% of the time.
Thanks. Anthony.

[Smokin19]

Originally Posted by Chev133

Hi,
Can someone tell me if I can keep the exhaust note louder but still have it in tour mode? It’s a 2019 ZL1. I’ve been told I can pull a fuse but witch one? I’m not worried about being able to make it quiet, it can stay louder 100% of the time.
Thanks. Anthony.

Go to settings, vehicle, car mode, sound and touch track mode the NNP exhaust will stay open. No need to pull fuse.

[23Redrocket]

Originally Posted by Smokin19

Go to settings, vehicle, car mode, sound and touch track mode the NNP exhaust will stay open. No need to pull fuse.

I'm pretty sure even in track mode under a certain RPM the valves will close.

[Broooster]

Fuse F51 under the hood for the exhaust valves.

[BMLMZ]

Originally Posted by 23Redrocket

I'm pretty sure even in track mode under a certain RPM the valves will close.

Yes it does. To have it stay full open, need to pull that fuse.

[Smokin19]

Originally Posted by 23Redrocket

I'm pretty sure even in track mode under a certain RPM the valves will close.

Owning NPP exhaust I will say again, when set in vehicle sound mode the vlvs stay open.

[tenargo57]

Originally Posted by Smokin19

Owning NPP exhaust I will say again, when set in vehicle sound mode the vlvs stay open.

I didn't see anything in the owner's manual about it, but there's a lot of talk on here stating that the valves are not always fully open in track mode. They partially close at highway speeds but are more responsive to open under acceleration than the other modes. I haven't tried it, but a lot of people swear by it.


https://www.camaro6.com/forums/showthread.php?t=454120


https://www.camaro6.com/forums/showthread.php?t=529477

[Gunkk]

Originally Posted by Smokin19

When set in vehicle sound mode the vlvs stay open.

Incorrect. The only two ways to keep them open 100% of the time is 1) fuse pull and 2) changing the tune in the car.

On a stock ZL1 (all variants including 1LE and convertible), the NPP still close in Track mode at moderate throttle/rpm/gears to avoid drone. The specifics have been extracted with HP tuners and posted on these forums and discussed and rediscussed a few times over the years.

[jvandy50]

Originally Posted by Smokin19

Owning NPP exhaust I will say again, when set in vehicle sound mode the vlvs stay open.

i wonder if your tuner changed the values in HPTuners and that is why yours stay closed.

[DangerZL1]

The fuse pull doesn’t make a huge difference in loudness or tone. I have mine pulled but don’t expect a significant difference since the exhaust still gets quieter at higher RPMs.