C7 Tech/Performance Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

Npp?

Thread Tools
 
Search this Thread
 
Old Jun 8, 2017 | 07:41 PM
  #1  
Bonesplus's Avatar
Bonesplus
Thread Starter
1st Gear
 
Joined: Jun 2017
Posts: 1
Likes: 0
Default Npp?

Si, I have read a lot in here, it's great for information.... but I still am unclear if I have npp or not..... it's a 2017 corvette stingray
I do have the control in the centeral display for stealth, sport and track etc... but when switching between them, I don't really hear too much difference, if at all.... I also pulled the fuse (41 or 42), and don't seem to hear a difference.... how can I definitely know whether I have it?
Reply
Old Jun 8, 2017 | 08:06 PM
  #2  
dbaker's Avatar
dbaker
Melting Slicks
15 Year Member
 
Joined: Sep 2005
Posts: 2,568
Likes: 264
From: Near Charlotte NC
Default

Go to the rear of the car and look inside at the L & R outermost pipes.

If you see a valve/flap,you have it.
If you don't,you don't.

\db2
Reply
Old Jun 8, 2017 | 10:47 PM
  #3  
vbdenny's Avatar
vbdenny
Drifting
 
Joined: Jul 2016
Posts: 1,481
Likes: 394
From: Virginia Beach Virginia
Default

Yes, the flaps are very apparent but a flashlight might help. You'll see them if they are there.
Reply
Old Jun 8, 2017 | 10:59 PM
  #4  
Nordic_Samurai's Avatar
Nordic_Samurai
Instructor
 
Joined: Oct 2016
Posts: 200
Likes: 97
From: San Jose CA
Default

Easiest thing is to look at the size of the exhaust tips...

Reply
Old Jun 8, 2017 | 11:55 PM
  #5  
lakemg's Avatar
lakemg
Melting Slicks
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Aug 2014
Posts: 2,746
Likes: 916
Default

If still not sure, take a photo of your exhaust tips and post for us to help...
Reply
Old Jun 9, 2017 | 04:17 PM
  #6  
stanklr's Avatar
stanklr
Pro
10 Year Member
 
Joined: Aug 2005
Posts: 507
Likes: 30
Default

Originally Posted by Bonesplus
Si, I have read a lot in here, it's great for information.... but I still am unclear if I have npp or not..... it's a 2017 corvette stingray
I do have the control in the centeral display for stealth, sport and track etc... but when switching between them, I don't really hear too much difference, if at all.... I also pulled the fuse (41 or 42), and don't seem to hear a difference.... how can I definitely know whether I have it?
from what you explained you Don't have NPP for sure.

Moving from eco/Touring to Sport/track is very very noticable.. the car gets louder at idle and WOT
Reply
Old Jun 9, 2017 | 04:17 PM
  #7  
Kent1999's Avatar
Kent1999
Le Mans Master
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Aug 2000
Posts: 6,486
Likes: 1,659
From: Las Vegas NV
Default

Originally Posted by dbaker
Go to the rear of the car and look inside at the L & R outermost pipes.

If you see a valve/flap,you have it.
If you don't,you don't.

\db2
Originally Posted by vbdenny
Yes, the flaps are very apparent but a flashlight might help. You'll see them if they are there.
Another way -- Just bend down and look at the short section of pipe connecting the muffler to the tips.
*If you see an actuator or *any* kind of 'gizmos' on the outer pipes, you've got NPP.
*If you see just plain pipe between the muffler and the tip-- no NPP.

Picture swiped from elsewhere:


Last edited by Kent1999; Jun 9, 2017 at 04:25 PM.
Reply
Old Jun 9, 2017 | 08:57 PM
  #8  
Red Mist Rulz's Avatar
Red Mist Rulz
Race Director
Community Builder
Loved
Community Favorite
Top Answer: 1
 
Joined: Sep 2016
Posts: 13,180
Likes: 10,528
Default

Or look at your window sticker for the Performance Exhaust option or Z51 option. If you have neither, you don't have NPP.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

5 Best & 5 Most Overrated Corvette Track Packages of All Time!

 Joe Kucinski
story-1

Every 2027 Corvette Engine Explained

 Joe Kucinski
story-2

Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

 Verdad Gallardo
story-3

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-4

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-5

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-6

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-7

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-8

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-9

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
Old Jun 10, 2017 | 10:50 AM
  #9  
Supraman45's Avatar
Supraman45
Racer
15 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Jun 2010
Posts: 316
Likes: 24
From: Greensboro NC
Default

Or look in the back hatch area under the carpet on the right side. There is a list of option codes there.
Reply

Get notified of new replies

To Npp?





All times are GMT -4. The time now is 12:03 AM.

story-0
5 Best & 5 Most Overrated Corvette Track Packages of All Time!

Slideshow: The 5 best and 5 most overrated Corvette track packages ever.

By Joe Kucinski | 2026-06-09 12:46:45


VIEW MORE
story-1
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

By Joe Kucinski | 2026-06-09 12:16:31


VIEW MORE
story-2
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.

By Verdad Gallardo | 2026-06-08 19:53:43


VIEW MORE
story-3
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-4
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-5
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-6
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-7
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-8
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-9
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE