Exhaust Question
Thread Starter
Racer
Joined: Jun 2016
Posts: 334
Likes: 165
From: Door County WI
Exhaust Question
Hi. Newbie here. Searched but could not find an answer.. I just bought a 2020 HTC without NPP. The rest of the car had everything we wanted but I hope I didn't make a big mistake. If I buy a used C8 NPP exhaust can I use it with my car with a NPP simulator and if so would the exhust valves be always open or always closed or no that will not work and you must go aftermarket? Thanks.
Race Director
Joined: Mar 2007
Posts: 11,394
Likes: 8,557
Hi. Newbie here. Searched but could not find an answer.. I just bought a 2020 HTC without NPP. The rest of the car had everything we wanted but I hope I didn't make a big mistake. If I buy a used C8 NPP exhaust can I use it with my car with a NPP simulator and if so would the exhust valves be always open or always closed or no that will not work and you must go aftermarket? Thanks.
Le Mans Master
Joined: Mar 2001
Posts: 8,471
Likes: 3,970
From: Omaha
2020 Corvette of the Year Finalist (performance mods)
C4 of Year Winner (performance mods) 2019
Honestly, I'd skip the NPP and do aftermarket. I've had my NPP set to Track since I bought the car in Feb and my wife hasn't complained once, which is a sure sign it's too quiet. 
It's a decent sound in Track, but still too quiet for many people. It's good at full throttle and above about 3500rpm, but below that at part throttle, it's very quiet. If I had it to do over, I would have skipped NPP and just gone with the stock base exhaust and replaced it with an aftermarket unit.
It's a decent sound in Track, but still too quiet for many people. It's good at full throttle and above about 3500rpm, but below that at part throttle, it's very quiet. If I had it to do over, I would have skipped NPP and just gone with the stock base exhaust and replaced it with an aftermarket unit.
Race Director
Joined: Mar 2007
Posts: 11,394
Likes: 8,557
Honestly, I'd skip the NPP and do aftermarket. I've had my NPP set to Track since I bought the car in Feb and my wife hasn't complained once, which is a sure sign it's too quiet. It's a decent sound in Track, but still too quiet for many people. It's good at full throttle and above about 3500rpm, but below that at part throttle, it's very quiet. If I had it to do over, I would have skipped NPP and just gone with the stock base exhaust and replaced it with an aftermarket unit.
It's a decent sound in Track, but still too quiet for many people. It's good at full throttle and above about 3500rpm, but below that at part throttle, it's very quiet. If I had it to do over, I would have skipped NPP and just gone with the stock base exhaust and replaced it with an aftermarket unit.
Thread Starter
Racer
Joined: Jun 2016
Posts: 334
Likes: 165
From: Door County WI
Bought this C8 after owning A C5 6m vert with Corsa Sport exhaust. Moved up to a C7 vert A6 with NPP. Did the fuse 41 hack to make it loud all the time and installed a range device to keep it in V8 mode all the time. Used Npp exhaust off new vehicles are available all the time at a fraction of aftermarket exhaust. I'm thinking that since the used NPP would be open all the time as what I had in my C7, that might be the way to go. I would rather error on the side of a little too quiet versus too loud and or droney as I have no way to change exhaust modes with a base exhaust car. What say you?
Race Director
Joined: Mar 2007
Posts: 11,394
Likes: 8,557
Bought this C8 after owning A C5 6m vert with Corsa Sport exhaust. Moved up to a C7 vert A6 with NPP. Did the fuse 41 hack to make it loud all the time and installed a range device to keep it in V8 mode all the time. Used Npp exhaust off new vehicles are available all the time at a fraction of aftermarket exhaust. I'm thinking that since the used NPP would be open all the time as what I had in my C7, that might be the way to go. I would rather error on the side of a little too quiet versus too loud and or droney as I have no way to change exhaust modes with a base exhaust car. What say you?
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