NPP Keep or Bail

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Nov 7, 2013 | 07:15 PM

#21

Glen e

Race Director

Joined: Sep 2013

Posts: 11,825

Likes: 2,474

From: Ft Lauderdale

Tech Contributor

I probably would not buy the NPP again. I just don't need it to be loud around town..or any other time. I like the stealth quiet mode....

Nov 7, 2013 | 10:21 PM

#22

Tommy D

Le Mans Master

Joined: Aug 2004

Posts: 5,259

Likes: 16

From: Monroe Township New Jersey

St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16

St. Jude donor in memory of jpee '14

I installed a Z06 exhaust on my C6 and utilized the vacuum lines instead of the mild to wild switch. It works fine for me. I am looking at buying at C7 and interested in the NPP exhaust. Please correct me if I am wrong.

My understanding is that it opens two valves in 4 cylinder mode to block out the 4 cylinder sound so the car sounds like a normal eight cylinder.

In normal eight cylinder driving; you can pick various increases in sound as you choose driving modes: touring, sport or track. From what I have read on the forum some members are not happy with the sound. If you nail the go pedal in touring or sport setting is the sound as loud as with the C6 with NPP ?

Looking at the C7 is it possible that the new electronic NPP works I differently in the 4 cylinder mode and then also works from closed to fully open in the various driver modes

Nov 7, 2013 | 10:28 PM

#23

TulsaVette

Safety Car

Joined: Aug 2000

Posts: 3,510

Likes: 43

From: Tulsa OK

My first C6 was a 2007 and it was not offered at that time. My 2013 has it and I would never have another Corvette without it. It is awesome!

Nov 7, 2013 | 10:32 PM

#24

rcallen484

Race Director

Joined: Dec 2011

Posts: 10,355

Likes: 12

Quote:

Originally Posted by Glen e

I probably would not buy the NPP again. I just don't need it to be loud around town..or any other time. I like the stealth quiet mode....

I really like the way my stock exhaust system sounds on HEAVY acceleration. I had my share of louder exhaust cars in my life. It's your guys' turn. Enjoy

Nov 7, 2013 | 10:35 PM

#25

texvette2

Race Director

Joined: Aug 2000

Posts: 14,860

Likes: 3

From: 96598

after market. Most are going to have it open all the time anyway

Nov 7, 2013 | 11:21 PM

#26

Zee51Vert

Pro

Joined: Jul 2013

Posts: 705

Likes: 35

From: Montreal Quebec

2024 C8 of the Year Finalist - Unmodified

Quote:

Originally Posted by pittperson

I don't have a disconnect with my NPP, works perfectly here. I had BB Bullets on the C6 and my wife refused to ride in the car so I went with NPP this time around. A "me" mode and a "wife" mode.

I'm with you ! My sound level and her sound level, perfect. Used to have a 66' vert with 427 and side exhaust. She would not get in at all. Fixed...

Nov 8, 2013 | 12:11 AM

#27

Matt26

Pro

Joined: Jan 2013

Posts: 639

Likes: 17

From: DFW TX

Aftermarket exhaust for me, no NPP needed.

Nov 8, 2013 | 01:04 AM

#28

Gr8ful

Pro

Joined: Sep 2013

Posts: 648

Likes: 2

From: Gulf Breeze Fl

Had Corsa in my last Vette but went with the NPP to keep factory stock and loud. I am sure glad I ordered it. Keep it open all the time. Sounds perfect and no drone. I hate drone.