Headers w/ Stock NPP Mufflers
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Joined: May 2022
Posts: 73
Likes: 19
From: Florida
Headers w/ Stock NPP Mufflers
This has probably been asked before, but I couldn't find a definite answer. I will be putting LT headers w/ cats on my Stingray sometime in the 6 months and I need to know how loud Stealth mode is while driving/on start up compared to Stealth mode with stock manifolds/cats. Like, if Stealth mode with stock manifolds and cats is at a level 2 out of 10 loud, what would it be with headers and stock NPP mufflers? Thank you!
Le Mans Master
Joined: Oct 2014
Posts: 8,673
Likes: 2,728
From: Atlanta GA
When my NPP are closed , it's like driving your fathers Buick , with them open and driving normal , no drone what so ever. With them open and going WOT ...sounds angry , very angry lol 😆
Dave
Dave
Le Mans Master
Joined: Oct 2014
Posts: 8,673
Likes: 2,728
From: Atlanta GA
Dave
Le Mans Master
Joined: Oct 2014
Posts: 8,673
Likes: 2,728
From: Atlanta GA
Headers and a tune are ussually worth 35 to 40 rwhp . The reason why this is a good mod for the money is this increase is across most of the poweband so its a real seat of the pants gain that you can feel without hurting the reliability of the car
Dave
Dave
Pro
Joined: Oct 2021
Posts: 703
Likes: 222
From: Central TX
I'll chime in, too. I have ARH LT with cats and NPP. With the valves closed it's barely louder than stock unless you are driving it pretty hard. Then it's just a little bit louder. It sounds better but not a lot more volume. With the valves open it's WAY louder than stock was with the valves open.
These cars are pretty loud with NPP open stock, but with headers they are VERY loud. I always put the car in tour mode when parking in the garage. Otherwise, it rattles the house at start up.
These cars are pretty loud with NPP open stock, but with headers they are VERY loud. I always put the car in tour mode when parking in the garage. Otherwise, it rattles the house at start up.
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Burning Brakes
Joined: Jul 2018
Posts: 752
Likes: 219
From: NW NJ
Yes, my Long Tubes Bark when NPP opened up!! When on in Stealth you would never Know it wasn’t Stock.
Le Mans Master
Joined: Oct 2014
Posts: 8,673
Likes: 2,728
From: Atlanta GA
Burning Brakes
Joined: Jul 2018
Posts: 752
Likes: 219
From: NW NJ
Racer
Joined: Jan 2009
Posts: 395
Likes: 194
From: Goderich, ON
Agree with all above, longtubes & cats & NPP is a wonderful configuration. In quiet mode sound level on your scale will be 2.5 - in open mode sound is sweet and thunderous.
And yes go with quality, ARH will fit absolutely perfectly with even clearance gaps all around.
And yes go with quality, ARH will fit absolutely perfectly with even clearance gaps all around.
Pro
Joined: Nov 2013
Posts: 582
Likes: 221
From: Manasquan,New Jersey
What is involved with header install? Is it all done from below on a lift? Like relatively easy? I would have to pay a shop. These babies are pricy! $2600. Can anyone give an idea of install time and cost? I guess if I were to do this, an ported manifold and Solar TB would be needed too? I was thinking Supercharger, but I think it would effect resale too much. I tend to not hold on long term.
Racer
Joined: Jan 2009
Posts: 395
Likes: 194
From: Goderich, ON
What is involved with header install? Is it all done from below on a lift? Like relatively easy? I would have to pay a shop. These babies are pricy! $2600. Can anyone give an idea of install time and cost? I guess if I were to do this, an ported manifold and Solar TB would be needed too? I was thinking Supercharger, but I think it would effect resale too much. I tend to not hold on long term.
Supporting Vendor
Joined: Nov 2015
Posts: 1,263
Likes: 280
From: Orange County, NY
As others have mentioned your C7 will be pretty much like stock when you close the valves. Quiet and very manageable. As if nothing has changed! Open the valves and she'll talk. I do have $300 off some Kooks headers for C7 options ending this month if you want to take advantage of a great deal now, and most configurations are in stock ready to ship! Happy to go over everything together!
-Ciro
201-575-0861
-Ciro
201-575-0861