Npp exhaust
Thread Starter
Melting Slicks
Joined: Mar 2003
Posts: 2,928
Likes: 55
From: Port Saint Lucie, Florida
Npp exhaust
Hi
my 2016 auto that l picked up has many options besides 2 lt .
My question is how do l control the sound which l feel is on all the time?
another thing is l am on V8 all the time and l checked for a plug in device in my steering wheel column.
l feel that it was tuned.
thanks
my 2016 auto that l picked up has many options besides 2 lt .
My question is how do l control the sound which l feel is on all the time?
another thing is l am on V8 all the time and l checked for a plug in device in my steering wheel column.
l feel that it was tuned.
thanks
Thread Starter
Melting Slicks
Joined: Mar 2003
Posts: 2,928
Likes: 55
From: Port Saint Lucie, Florida
I just checked it and there is no difference between all the different settings.
l drive around town in E
l drive around town in E
Last edited by Kingman99; Jan 11, 2026 at 07:43 PM. Reason: Adding
Team Owner
Joined: Mar 2012
Posts: 49,384
Likes: 3,924
From: Best Island in the U.S.
St. Jude Donor '12 thru '17
Here’s a good discussion of the NPP and AFM valves on a C7:
https://www.corvetteforum.com/forums...planation.html
Not all C7s have NPP exhaust. Your window sticker will tell you if yours has it.
https://www.corvetteforum.com/forums...planation.html
Not all C7s have NPP exhaust. Your window sticker will tell you if yours has it.
Drifting
Joined: Jun 2015
Posts: 1,860
Likes: 695
From: Lagrange KY
Hi
my 2016 auto that l picked up has many options besides 2 lt .
My question is how do l control the sound which l feel is on all the time?
another thing is l am on V8 all the time and l checked for a plug in device in my steering wheel column.
l feel that it was tuned.
thanks
my 2016 auto that l picked up has many options besides 2 lt .
My question is how do l control the sound which l feel is on all the time?
another thing is l am on V8 all the time and l checked for a plug in device in my steering wheel column.
l feel that it was tuned.
thanks
Thread Starter
Melting Slicks
Joined: Mar 2003
Posts: 2,928
Likes: 55
From: Port Saint Lucie, Florida
I have a port on both sides of the steering wheel column. I have the range device but it’s not
plugged into either side.
My engine stays in 8 cylinders all the time.with no plug in.
My window sticker notes Npp plus mag ride and PDR plus other options
plugged into either side.
My engine stays in 8 cylinders all the time.with no plug in.
My window sticker notes Npp plus mag ride and PDR plus other options
Team Owner
Joined: Mar 2012
Posts: 49,384
Likes: 3,924
From: Best Island in the U.S.
St. Jude Donor '12 thru '17
There is no port on the left side of the steering column. The port on the right side is to insert the fob to start the car if the fob battery is dead. Range device plugs into the OBD port under the dash.
How do you know you have a Range device and how do you know it’s always in V8 mode?
How do you know you have a Range device and how do you know it’s always in V8 mode?
Thread Starter
Melting Slicks
Joined: Mar 2003
Posts: 2,928
Likes: 55
From: Port Saint Lucie, Florida
Range device GTMOTOR also attached topdown. Tech window valet.
the port on the right hand side correct)and a multi pin connector on the left side which is the OBD
I was told on the main screen should have a V8 showing but when stopped it changes to V4
the port on the right hand side correct)and a multi pin connector on the left side which is the OBD
I was told on the main screen should have a V8 showing but when stopped it changes to V4
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Team Owner
Joined: Mar 2012
Posts: 49,384
Likes: 3,924
From: Best Island in the U.S.
St. Jude Donor '12 thru '17
Drifting
Joined: Jun 2015
Posts: 1,860
Likes: 695
From: Lagrange KY
I assume you’re asking why the car stays in V8 mode? If so, the answer is Yes. The Range device or a tune will do that. But without prior knowledge of the cars mx history, I’m not sure how to determine that a tune has been performed.
Last edited by Squeaky Wheel; Jan 12, 2026 at 09:23 PM. Reason: Added info