Art17

Hello, I have a 2017 1LT
Does the stock exhaust have a flap valve?
It is not the dual mode option.

Hello, can anyone tell me if the 1LT exhaust used a flapper valve on the system or does all of the exhaust go out all four exhaust tips.

thanks

DAFFYDRUNK

It still has valves for the AFM mode, so yea. I'm not sure exactly what they do exactly, but it's to quiet the exhaust even more than the non NPP already is.

RicK T

1LT has nothing to do with the exhaust.

If the car does not have the optional NPP exhaust then yes, the exhaust exits all 4 tips.

Art17

I wonder if they only function with WOT?

Art17

Thank you so much for the information .
looks like when I accelerate the exhaust will never be loud , unfortunately.

JimNeedsC7

Well, only until you fix that problem! There are lots of exhaust options to chose from for your C7. There are also a lot better engine sounds available, hiding right there under your nose.

Art17

Oh, okay.
I will need to do some research.
my 09' had the dual mode and it was great.
thank you!

TEXHAWK0

Remember that some exhausts sounds good around town but can be unbearable at highway speeds. For that reason I chose to just stick with the stock exhaust.

RicK T

AFM valves work with V4 mode.

Art17

That's Is a really good point
when I got out on freeway on a trip with my 09 Vet I would always turn the exhaust down to low

This Is surprising to me
do some of my cylinders on my V-8 shot down at cruising speed ?
I will not take possession of my new Corvette until next week

Steve Garrett

Art, welcome to CorvetteForum.

Your two threads have been merged together. According to Forum rules, you can only start one thread on any particular subject.

AceG

Like you, i gotten the 1lt with no npp. It sounds so dam quiet its unreal, excpecially for a corvette. Fortunetly you can upgrade to many exhaust systems that sounds incredible.

My personal choice is the corsa xtreme package.

Maryland speed gives the beat pricing by far.

Cold start up just sounds woah..amazing quite loud but within 20 seconds it will quiet down to as if its on stock exhaust.
Every time you accelerate though, the sound returns. Put the pedal to the metal and it screams.
In my opinon the perfect balance. Plus you get to choose the finish of the tips and size. They even offer the rectangular finish for a more exotic look.

Art17

Thank you for the info!
I will check it out.

tbasco 6

When you set the dial on the console to E it goes to 4 cylinders when 8 aren't needed.

hangman

If it is an automatic, it will go into V4 in any drive mode, not just E. The only way an automatic will stay in V8 and bypass V4 mode is to put the tranny in Manual mode and use the paddle shifters.

Art17

Hey, thank you all on the information about the exhaust and the V4. The V4 business was a total surprise to me.

hangman

Art17, I purchased my 1LT specifically without the NPP exhaust because I wanted a different sound from the aftermarket exhaust. I replaced the exhaust with a Corsa Extreme and am very happy with the sound. The extreme has a much nicer sound that to me sounds much meaner but at the same time more refined than the stock NPP exhaust. And at cruising speed on the highway it is hush hush quiet without any drone.

Art17

That is good advice . I will need to run my car for a while before I put any more money into it .
This is certainly something that would be good to do down the road in the future . Thank you !

dbirdhouse1

....as she is my daily and because I am retiring next year so she is a keeper I sprung for the Corsa Sport exhaust system....alittle less on the sound but something I can live with for the next 20 plus years, got mine from Auto Anything; 1400 for the exhaust and another 300 to have it installed, zowie, nice noises when wanted but no droning of any kind....and it fills up the space just perfectly......

funny though I saved the stock system, really don't know, seemed like such a waste just to chuck it....

hangman

I sold the stock exhaust on Craigslist for $150. Some guy bought it for a project he was working on.