C7 question






You control the modes by the dial on the console or in the infotainment screen. It is programmable.
Last edited by c54u; Jan 25, 2019 at 08:31 PM.
The Best of Corvette for Corvette Enthusiasts





Last edited by LarryFL; Jan 26, 2019 at 07:11 AM.
MORE INFO THAN YOU MAY WANT!
I had the NPP option in my C6 that I added a toggle switch so I could control when the mufflers were "essentially" bypassed. I bought NPP for my 2014 Z51 and as mentioned came standard on my Grand Sport. However my perspective on "must have" is a bit different than some others, I'll explain. If you look at forum Threads about adding an X-Pipe or removing the muffles you'll see for some folks it's not as aggressive a sound as they would like! In fact, IMO it's not as "good a sound" as you can buy from Borla (who have several sound options) and others. However in addition to the installation cost they sell for more than $1000.
NPP operates about this way. Depending on the Driving Mode control setting the mufflers are "mostly" bypassed at certain rpm's. You can also set them to always open as if in a specific drive mode regardless of the drive mode setting. For example, I have mine set at "Always Track Mode." So although I now drive in Sport Mode and was Driving in Touring Mode the butterflies controlling the system always opened at ~1700 rpm. The mufflers are "essentially" bypassed at ~1700 rpm. Below that level the butterflies controlling the system are closed and the car is "less loud." In the more normal setting Tour Mode, they open later at ~2500 rpm.
There is a bit of a contaversey about them always being open at Track Mode setting BUT I find there is a distinct sound change at ~1700 rpm AND folks who think they want more control who buy a Mild to Wild switch agree it does not stay open all the time in Track Mode. Also some remove the fuse that controls the system so they never close. However that may cause an objectionable drone at highway speeds depending on what you think is objectionable!
Others add what is called and X-Pipe. Actually all Vettes in recent years have had an X-Pipe as does the C7, with or without NPP! These devices sold by Borla etc actually remove the Secondary CATs so add more sound.
Bottom Line
I have NPP and it's acceptable set at always Track Mode. I find no need for an "X-Pipe" or a Mild to Wild switch. But, IMO, it does not sound a good as a friend who had a Bola system or the FlowMaster muffler and duals I had on my S10! I also added other mufflers and made and fabricated an H pipe for my 1st Vette, a 1988, that sounded better. To each their own!
Last edited by JerryU; Jan 26, 2019 at 07:44 AM.

MORE INFO THAN YOU MAY WANT!
I had the NPP option in my C6 that I added a toggle switch so I could control when the mufflers were "essentially" bypassed. I bought NPP for my 2014 Z51 and as mentioned came standard on my Grand Sport. However my perspective on "must have" is a bit different than some others, I'll explain. If you look at forum Threads about adding an X-Pipe or removing the muffles you'll see for some folks it's not as aggressive a sound as they would like! In fact, IMO it's not as "good a sound" as you can buy from Borla (who have several sound options) and others. However in addition to the installation cost they sell for more than $1000.
NPP operates about this way. Depending on the Driving Mode control setting the mufflers are "mostly" bypassed at certain rpm's. You can also set them to always open as if in a specific drive mode regardless of the drive mode setting. For example, I have mine set at "Always Track Mode." So although I now drive in Sport Mode and was Driving in Touring Mode the butterflies controlling the system always opened at ~1700 rpm. The mufflers are "essentially" bypassed at ~1700 rpm. Below that level the butterflies controlling the system are closed and the car is "less loud." In the more normal setting Tour Mode, they open later at ~2500 rpm.
AND folks who think they want more control who buy a Mild to Wild switch agree it does not stay open all the time in Track Mode. Also some remove the fuse that controls the system so they never close. However that may cause an objectionable drone at highway speeds depending on what you think is objectionable!
Others add what is called and X-Pipe. Actually all Vettes in recent years have had an X-Pipe as does the C7, with or without NPP! These devices sold by Borla etc actually remove the Secondary CATs so add more sound.
Bottom Line
I have NPP and it's acceptable set at always Track Mode. I find no need for an "X-Pipe" or a Mild to Wild switch. But, IMO, it does not sound a good as a friend who had a Bola system or the FlowMaster muffler and duals I had on my S10! I also added other mufflers and made and fabricated an H pipe for my 1st Vette, a 1988, that sounded better. To each their own!
Jerry. I have mine set to sport only, sounds good at take off, but they do close at some point/rpms when cruising. However, I kinda like it that way. As I've grown more mature (re: old
) I've found that cruising without a roar from the exhaust is right up my ally.
Last edited by Rebel Yell; Jan 26, 2019 at 01:15 PM.
I warn people around the car that it will be loud and they still jump when it starts...must be he pulse of the sound wave radiating through their body.

I loved it... 80% of the time, the other 20% of the time your thinking: why did I ruin my car
I was bit worried about the Borla X-Pipe having that effect, but once the valves close the car goes back to sounding like stock.













