longtubes with stock NPP Exhaust is Amazing

Saberscar223 · 05-13-2023, 12:56 AM

Just in case anyone is on the edge of getting long tube headers do it. I have done literally nothing to my car except long tubes at the moment and it sounds Insane and the difference between stealth and track mode is MUCH bigger now. I think stealth mode actually sounds quieter than stock headers did and track mode is insanely loud especially for keeping the NPP exhaust.

Haven’t experienced droning or anything of the sort it’s just been super fun.

I got Kooks 2” headers with OEM cat connections

SSShark · 05-13-2023, 06:00 AM

Quote:

Originally Posted by Saberscar223

Just in case anyone is on the edge of getting long tube headers do it. I have done literally nothing to my car except long tubes at the moment and it sounds Insane and the difference between stealth and track mode is MUCH bigger now. I think stealth mode actually sounds quieter than stock headers did and track mode is insanely loud especially for keeping the NPP exhaust.

Haven’t experienced droning or anything of the sort it’s just been super fun.

I got Kooks 2” headers with OEM cat connections

Please post a video

knighti2 · 05-13-2023, 07:20 AM

I went Kooks headers and green cats while keeping stock NPP exhaust as well. Im happy with the sound improvement.

knighti2 · 05-13-2023, 07:35 AM

Quote:

Originally Posted by SSShark

Please post a video

I don't believe I see a way to post up video I have from home of cold start. Here is one from the shop that did the work when on dyno. May give you some idea of sound.

Facebook video from shop:
https://www.facebook.com/LateModelDo...32583344700620

SSShark · 05-13-2023, 07:48 AM

Quote:

Originally Posted by knighti2

I don't believe I see a way to post up video I have from home of cold start. Here is one from the shop that did the work when on dyno. May give you some idea of sound.

Facebook video from shop:
https://www.facebook.com/LateModelDo...32583344700620

Sounds awesome @knighti2! Been thinking of installing headers somewhere down the road myself. Enjoy the music brother.

302crossram · 05-13-2023, 07:50 AM

to me that's the ultimate set up, best of both worlds.

I test drove a 1le with kooks & complete aftermarket system.
Sounded just like Nascar
amazing sounds but living with that everyday would get old

Spaceme1117 · 05-13-2023, 09:11 AM

The engineers did an amazing job with the factory exhaust and is one of the best things about the car.

I added Kooks headers with cats also going into the factory NPP. I was a bit concerned at first as it is FREAKING LOUD on a cold start. But gets quite when it idles down.

I am used to it now and it is awesome.

And once you get your car tuned for the headers, it really lets the LT1 flow. Above 5000 rpm, with headers, the power and torque gains are incredible and power and torque do not drop off anywhere near as much as with the factory manifolds.

db2022cs · 05-13-2023, 12:48 PM

I'm going to wait until I get most of the way through my warranty before I do something that I have to tune. One thing I have been curious about is passing inspection and emissions. Do you have the stock cats put back on or are you using aftermarket? I have seen so many mixed answers to this, I would rather not have any issues trying to get car inspected with modified upstream exhaust. This is the route I do want to take, I love the sound of the stock NPP.

knighti2 · 05-13-2023, 01:09 PM

Quote:

Originally Posted by db2022cs

I'm going to wait until I get most of the way through my warranty before I do something that I have to tune. One thing I have been curious about is passing inspection and emissions. Do you have the stock cats put back on or are you using aftermarket? I have seen so many mixed answers to this, I would rather not have any issues trying to get car inspected with modified upstream exhaust. This is the route I do want to take, I love the sound of the stock NPP.

Stock cats will not mate up to long tube headers. So you go with aftermarket, I used Kooks green cats, or you go catless.

You having emissions inspections will need aftermarket im guessing. Whether your state will give you any hassles I can not comment on. I live in Va.

knighti2 · 05-13-2023, 01:11 PM

Quote:

Originally Posted by SSShark

Sounds awesome @knighti2! Been thinking of installing headers somewhere down the road myself. Enjoy the music brother.

Thanks. I was hesitant for quite awhile on having them done. Once done it was one of those "never should have waited" moments.

SSShark · 05-13-2023, 01:17 PM

Quote:

Originally Posted by knighti2

Thanks. I was hesitant for quite awhile on having them done. Once done it was one of those "never should have waited" moments.

Happy for you man!

Need4Camaro · 05-13-2023, 03:34 PM

I was thinking of keeping my stock mufflers but decided to go Borla ATAK ... couldnt be happier.

knighti2 · 05-13-2023, 07:32 PM

Quote:

Originally Posted by Need4Camaro

I was thinking of keeping my stock mufflers but decided to go Borla ATAK ... couldnt be happier.

I am sure yours absolutely sings the song of its people. (and loudly)

LovellW · 05-13-2023, 11:06 PM

So what headers will keep the same sound but louder? I don’t want it to be any deeper I like the higher pitch that the NPP has.

05-13-2023, 12:56 AM	#1
Saberscar223 Drives: 2023 Riverside Blue 2SS Join Date: Sep 2022 Location: Denver,CO Posts: 144	longtubes with stock NPP Exhaust is Amazing Just in case anyone is on the edge of getting long tube headers do it. I have done literally nothing to my car except long tubes at the moment and it sounds Insane and the difference between stealth and track mode is MUCH bigger now. I think stealth mode actually sounds quieter than stock headers did and track mode is insanely loud especially for keeping the NPP exhaust. Haven’t experienced droning or anything of the sort it’s just been super fun. I got Kooks 2” headers with OEM cat connections

05-13-2023, 07:20 AM	#3
knighti2 Drives: 2SS M6 Hot Wheels #515 Join Date: May 2020 Location: Virginia Posts: 103	I went Kooks headers and green cats while keeping stock NPP exhaust as well. Im happy with the sound improvement. __________________ Rotofab, Soler 87mm ported TB, Kooks headers / green cats, MSD wires, flex fuel Stock intake (no porting) and stock NPP exhaust.

05-13-2023, 12:48 PM	#8
db2022cs Drives: 2023 2SS 1LE Join Date: Dec 2022 Location: Raleigh, NC Posts: 114	I'm going to wait until I get most of the way through my warranty before I do something that I have to tune. One thing I have been curious about is passing inspection and emissions. Do you have the stock cats put back on or are you using aftermarket? I have seen so many mixed answers to this, I would rather not have any issues trying to get car inspected with modified upstream exhaust. This is the route I do want to take, I love the sound of the stock NPP. __________________ 2023 Riverside Blue Metallic 2SS 1LE Camaro 2021 Black Hyundai Veloster N -Sold- 2016 Grey Chevy Volt -Sold- 2018 Blue AWD Kia Stinger GT2 -Sold-

05-13-2023, 07:50 AM	#6
302crossram Drives: 2023 Sharkskin 2SS Join Date: Oct 2022 Location: NWFL Posts: 758	to me that's the ultimate set up, best of both worlds. I test drove a 1le with kooks & complete aftermarket system. Sounded just like Nascar amazing sounds but living with that everyday would get old

05-13-2023, 09:11 AM	#7
Spaceme1117 Drives: 2017 Camaro SS, 2011 Corvette GS Join Date: Feb 2019 Location: Erlanger, Kentucky 41018 Posts: 815	The engineers did an amazing job with the factory exhaust and is one of the best things about the car. I added Kooks headers with cats also going into the factory NPP. I was a bit concerned at first as it is FREAKING LOUD on a cold start. But gets quite when it idles down. I am used to it now and it is awesome. And once you get your car tuned for the headers, it really lets the LT1 flow. Above 5000 rpm, with headers, the power and torque gains are incredible and power and torque do not drop off anywhere near as much as with the factory manifolds.

05-13-2023, 03:34 PM	#12
Need4Camaro Drives: '17 Camaro 2SS & '99 Camaro Z28 Join Date: Feb 2014 Location: Austin, TX Posts: 1,836	I was thinking of keeping my stock mufflers but decided to go Borla ATAK ... couldnt be happier.

05-13-2023, 11:06 PM	#14
LovellW Drives: 2023 2SS & C6 Vette Join Date: Apr 2023 Location: Arkansas Posts: 32	So what headers will keep the same sound but louder? I don’t want it to be any deeper I like the higher pitch that the NPP has.

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