Headers with stock NPP?
Thread Starter
Safety Car
Joined: Jun 2004
Posts: 4,983
Likes: 393
From: Stoney Creek Ontario
Headers with stock NPP?
My new to me '17 Z51 with NPP is too quiet for me compared to my heads/cam modded C5, thinking about headers and X pipe with the stock NPP mufflers.... To get some sound out of it...Anybody running a similar set up? I'm considering TSP headers and X pipe....
thanks for any input / thoughts!
thanks for any input / thoughts!
Dig
Joined: Jan 2006
Posts: 5,466
Likes: 1,126
From: Port Saint Lucie FLORIDA & HONDURAS
My new to me '17 Z51 with NPP is too quiet for me compared to my heads/cam modded C5, thinking about headers and X pipe with the stock NPP mufflers.... To get some sound out of it...Anybody running a similar set up? I'm considering TSP headers and X pipe....
thanks for any input / thoughts!
thanks for any input / thoughts!
Thread Starter
Safety Car
Joined: Jun 2004
Posts: 4,983
Likes: 393
From: Stoney Creek Ontario
thanks for the replies....was considering the TSP headers with the stock NPP as long as I can get some acceptable sound out of it.....less expensive than some of the aftermarket NPP cat backs available plus there's more HP increase with the long tubes than an axle back muffler system...
Last edited by dankhts; Oct 5, 2020 at 08:33 AM. Reason: p
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Pro
Joined: Mar 2016
Posts: 542
Likes: 52
From: El Paso Texas
I ran the tsp 17/8 with offroad xpipe and npp sounded good and still had control went to magnaflow comp exhaust and got super loud even in stealth mode
now have corsa extreme its pretty tame but the exhaust note and volume are great
now have corsa extreme its pretty tame but the exhaust note and volume are great
Racer
Joined: Sep 2011
Posts: 409
Likes: 91
I'm running ARH long tubes with the hi-flow cats and the stock NPP mufflers. I added a mild to wild switch for maximum control. It's pleasantly loud with the valves open and really quiet with them closed. I switched my engine sound management to stealth mode to allow for "full on" and "full off" with the MTW switch. I really like the setup.
Advanced
Joined: Jun 2017
Posts: 79
Likes: 8
I've got tsp long tubes (hi flow cats) with stock npp mufflers.
They are LOUD! The car sounds absolutely amazing. The best way to explain the sound is like an American ferrari. They do cause a check engine light though. I had to tune the car to remove the CEL.
My car made 435/440 with headers and a tune.
They are LOUD! The car sounds absolutely amazing. The best way to explain the sound is like an American ferrari. They do cause a check engine light though. I had to tune the car to remove the CEL.
My car made 435/440 with headers and a tune.
Instructor
Joined: Mar 2018
Posts: 222
Likes: 138
From: Fountain Hills, AZ
2016 Z51 with NPP, Corsa 1 7/8 long tube headers, with the Corsa offroad x-pipe, and Mild2Wild NPP switch. It's very loud when I want it which is almost always, and very quite when needed (early morning starts without waking the neighbors). 638 whp which is a ton of fun!
Last edited by ricmalaz; Oct 9, 2020 at 12:25 AM.
Intermediate
Joined: Jan 2020
Posts: 45
Likes: 1
My new to me '17 Z51 with NPP is too quiet for me compared to my heads/cam modded C5, thinking about headers and X pipe with the stock NPP mufflers.... To get some sound out of it...Anybody running a similar set up? I'm considering TSP headers and X pipe....
thanks for any input / thoughts!
thanks for any input / thoughts!
I would keep the NPP stock mufflers for now. The NPP is a nice function because you can always silence it when you have to. Get an aftermarket or muffler delete later if you want to be louder.
Burning Brakes
Joined: Oct 2014
Posts: 1,057
Likes: 339
Get headers and keep the NPP. It will be plenty loud with valves open and you’ll be able to close them when you pull up to the drive through at McDonalds to get that coffee. NOBODY wants to hear that loud **** ALL the time. Except maybe those Mustang guys. It really gets annoying. And by the way, aftermarket deletes or mufflers would only add about 2 horsepower. You’d save enough for coffee for the next 5 years if you keep the NPP.
Safety Car
Joined: Apr 2008
Posts: 4,831
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From: NJ
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It's an oem exhaust option on the C7s which allows you to operate the sound of the exhaust sytem by manually operating the valves to various settings.
Safety Car
Joined: Apr 2008
Posts: 4,831
Likes: 1,847
From: NJ
2025 C8 of the Year Finalist - Modified
2023 C8 of the Year Finalist - Unmodified
2022 C7 of the Year Finalist - Modified
2021 C7 of the Year Finalist - Unmodified
This is a great thread btw. I always have mine in track mode and it's too quiet for me. I'm working on installing the mild to wild but that still won't be enough. My C5 with Bullets, headers and high flow cats sounds amazing compared to my C7.qaaaaaaaw