Hurrytovette

I have a 2014 Stingray and was wondering what would be a ballpark price to install duel mode exhaust and is it something that could be done by the owner.
Thanks in advance for any ideas.

JackTripper

Explain Duel Mode. Does your car have the NPP exhaust that you can choose different sound modes? I know that 2015 on has this, but I can't remember if the 14's have this feature.

Zymurgy

NPP has been available on all MY C7s.


I assume the OP is asking about the possibility of installing NPP on a car that does not have NPP. The answer is that it is probably not worth the effort. The wiring harness for the exhaust valves is not present on non-NPP equipped C7s.


OP, you probably want to look at some aftermarket alternatives.

JackTripper

What I mean by the "feature" is the DIC option for Stealth, Tour, Sport and Track under Engine Sound Mgmt.

Kent1999

It was optional on the 2014's.

As far as retrofitting it -- while possible, I don't know if the electronics are all there to make it a 'plug n play' op on a car not originally equipped. The C6's were vacuum operated, so it was relatively easy to plumb a vacuum line. C7 NPP is electric, and I don't know that the car will just automagically pick it up and control it. Likely not, I'd wager.

My guess is at least $1000 for parts alone, and there is still the unknown as to whether the car would recognize it. You might find that it is easier & cheaper to go aftermarket. Lots to choose from.

paulrichy

The parts are closer to 2000, simple installation by any mechanic, did it on my 06. By far the coolest and most fun modification I have ever done to any vehicle I have owned.

Boiler_81

This question has been asked on this forum many times. Each time it was determined the effort and cost to the conversion is excessive. As far as I know, no one has done this.

The C7 would require the exhaust system, wiring harnesses and electronics.

Zymurgy

OK. 2014 has Engine Sound Management (if you have NPP) but there are only two options: Auto or Off.


I believe Auto is similar to Tour and Off is similar to Track, but I really don't know that for sure.

Zymurgy

NPP on the C6 and NPP on the C7 are very different animals.

Foosh

On the 14, the choices are "Mode Dependent" and "Off." In the former, valves are open most of the time in Sport and Track, and in the quiet setting for all other modes. It's really no different than the later versions, which had a setting for each mode, and accomplished the same thing.

The "Off" setting is open in any mode most of the time.

hangman

I have a non NPP and have those settings as well. But it apparently doesn't do anything since I don't have the valves. Wonder why they still have that as an option in the DIC without NPP.

drs

The different modes alter several attributes, including NPP exhaust settings if the car is so equipped.

F4 Phantom

[QUOTE=Hurrytovette;1594151373]I have a 2014 Stingray and was wondering what would be a ballpark price to install duel mode exhaust and is it something that could be done by the owner.
Thanks in advance for any ideas.[/QUOTE
My 14 C 7 has NPP exhaust. BTW, it's "dual."]

Foosh

This is true, including such things throttle mapping, steering feel, and MSRC settings if so equipped. However, there are really only two NPP modes. Sport/Track, which are mostly open, and all other modes, which are mostly closed.

That's why the 14's were simpler with only two settings, "Mode Dependent" and "Off." Later MYs offer one the option of a Sport/Track NPP setting in Tour (or any other) mode, but on a '14 you'd simply select "Off" to do the same thing.

And, of course, the only way to keep the valves open all the time is to pull the NPP fuse (#41 in 14's and #42 in all other model years).

Hurrytovette

Thanks for the input everyone. I love my stingray and just wanted to hear it "talk" to me a little louder.

Rooster OG

There are lots of good aftermarket solutions that will add a little or a lot of sound. Borla, Corsa and Akropovic to name a few.

paulrichy

Not really prices for the mufflers are close to the same price new, MTW kit same price. Wiring is in place on the c7s. Do a google search which incorporates posts from this forum, this site is full of c7 npp conversion information.

JerryU

And several have offered their own version of an NPP for none NPP originals. But as I recall some have had issues. There was an electrical harness that could be added but it was expensive and had some negative issues as well. It wasn't a perfect solution. Folks bought it because they got an NPP set of muffles and valves FREE or very cheap when others replaced their NPP system with a better sounding aftermarket system like Borla, Flowmaster etc!

If they were doing that it was for a reason-before trying to match the NPP why not research what might be a better solution! NPP is fine for me but not perfect. However it comes with my Grand Sport on order and is good enough. I paid extra for it in my C6 and my 2014 Z51 since I didn't want to bother with getting an aftermarket system

NPP electric motor actuators integrate into the computer and it changes the rpm at which the butterflies open and close. Less for Touring, more for Track etc. In addition there is a feedback circuit that tells the computer the electric motor did as instructed. If not, it trips a code. Lots of early issues when folks tried to install remote relays to control the NPP vales. Finally they figured out how!

IMO the OP would be better off with an aftermarket system depending on what they are looking to hear! Borla for example, has several sound levels. They are in the business of designing a sound into their muffler systems where NPP just opens the exhaust. It's less restriction, noisier but you can get a better sound, IMO.

There are video's and sound tracks you can listen to as well. OP should check out their websites.

PS: Had a ride in a Lamborghini the other day! The Vette, with any muffler system or even straight pipes, can't match it! They sure worked on that exhaust sound!

John Micheal Henry

On my 2014 Z51: Pull fuse #41 and the mufflers are OFF.. Period..

Hurrytovette

Thats actually my question too. Guess I'll have to look at after market or just enjoy what I have.
Thanks