Stock exhaust sound change

MackSteelPrivateEye · 04-10-2020, 11:10 AM

Hi, 17' SS 6 spd with the dual mode stock setup. Coming up on 35k miles. And after videoing from when new to now I noticed my exhaust sound has changed. It seems to sound better, a little smoother, less raspy and poppy but more of a gravely sound now. Anyone else notice this? Perhaps the steel of the muffler had to season with age from hot to cold and carbon deposits. In any case I have no intension of ever replacing my exhaust now. I had it in the back of my mind but it never really made sense with the Dual mode setup which was an option anyway. Such a waste to throw away a good exhaust we paid extra for.

SomeGeoffGuy · 04-10-2020, 11:28 AM

I totally agree - the stock exhaust sounds perfect. I used to work with the Camaro team, and you would not believe the amount of time they spent getting that exhaust sound just right. And then, at the very last minute they switched to an X from an H. They spent hours doing hole shots and sound comparisons to make sure that they didn't change the note that they had originally bought off on with the H. I don't think a stock exhaust has ever had more engineering time put into it than the 2016 Camaro.

-Geoff

Deputy Dog · 04-11-2020, 01:05 AM

Quote:

Originally Posted by MackSteelPrivateEye

Hi, 17' SS 6 spd with the dual mode stock setup. Coming up on 35k miles. And after videoing from when new to now I noticed my exhaust sound has changed. It seems to sound better, a little smoother, less raspy and poppy but more of a gravely sound now. Anyone else notice this? Perhaps the steel of the muffler had to season with age from hot to cold and carbon deposits. In any case I have no intension of ever replacing my exhaust now. I had it in the back of my mind but it never really made sense with the Dual mode setup which was an option anyway. Such a waste to throw away a good exhaust we paid extra for.

I think I noticed more Snap but with less Crackle and Pop.

arpad_m · 04-11-2020, 09:50 AM

Quote:

Originally Posted by SomeGeoffGuy

I totally agree - the stock exhaust sounds perfect. I used to work with the Camaro team, and you would not believe the amount of time they spent getting that exhaust sound just right. And then, at the very last minute they switched to an X from an H. They spent hours doing hole shots and sound comparisons to make sure that they didn't change the note that they had originally bought off on with the H. I don't think a stock exhaust has ever had more engineering time put into it than the 2016 Camaro.

-Geoff

I love my NPP as well and don't intend to replace it any time soon. Menacing cold start, quiet 45 dB cruising with powerful 95dB WOT scream, just enough rasp and absolutely no drone, plus no issue with inspection in this nanny CARB state.

Gotta admit that the large suitcase muffler is a bit unsightly, though, but at least it makes for smoother airflow under the car, practically all aftermarket catback or axleback exhausts introduce random pockets and obstructions.

SSDan · 04-11-2020, 10:35 AM

Quote:

Originally Posted by arpad_m

Gotta admit that the large suitcase muffler is a bit unsightly.

Spray paint it black - it disappears.

OP - I am very pleased with the NPP and will not change it. I've had my share of all the time loud exhausts and the drone that goes with them. No more - the NPP does the job - I just leave it in Sport and go. I have not noticed any real sound change over 27K miles other than I know it has not gotten quieter.

CoeusAscended · 04-11-2020, 04:54 PM

I love the sound of NPP but I wouldn't mind it being a bit deeper and more rumble, but dont know if that minor change is worth the 1+k for an AWE axleback though.. that being said, the stock tips need to be at least 4" in diameter to fill out the rear bumper well, honestly it looks kind of weird with the gaps between the pipes and the rest of the bumper.

SomeGeoffGuy · 04-12-2020, 02:34 PM

Quote:

Originally Posted by CoeusAscended

that being said, the stock tips need to be at least 4" in diameter to fill out the rear bumper well, honestly it looks kind of weird with the gaps between the pipes and the rest of the bumper.

I think there is a minimum requirement to prevent melting the fascia. That is why you see the Cadillacs and even Silverado now have a metal insert in the fascia/bumper with a black exhaust pipe inserted inside.

-Geoff

s346k · 04-12-2020, 03:18 PM

i changed the sound of my stock exhaust. i started by removing it. those are solo’s tips included with the muffler delete axle back.

NA18CamaroSS · 04-12-2020, 03:31 PM

Did a cat delete and the exhaust is pretty loud now. Thanks to Chevy for NPP-the stealth mode makes it tolerable when the wife has to ride shotgun.

CoeusAscended · 04-12-2020, 04:29 PM

Quote:

Originally Posted by SomeGeoffGuy

I think there is a minimum requirement to prevent melting the fascia. That is why you see the Cadillacs and even Silverado now have a metal insert in the fascia/bumper with a black exhaust pipe inserted inside.

-Geoff

In the case of 4.5" tips, I could buy that, but the ZL1 has the same bumper as the SS and uses 4" tips that nowhere touch the bumper and just fill out the rear better. However that could be the reason they went with 3.5" for the SS; to give the ZL1 a further upgrade over it.

Jaxcam02 · 04-12-2020, 04:52 PM

They look fine to me I just wish I could keep them clean. Can't wait until warranty is over and I can do corn

ParisTNDude · 04-14-2020, 01:24 PM

Quote:

Originally Posted by CoeusAscended

I love the sound of NPP but I wouldn't mind it being a bit deeper and more rumble, but dont know if that minor change is worth the 1+k for an AWE axleback though.. that being said, the stock tips need to be at least 4" in diameter to fill out the rear bumper well, honestly it looks kind of weird with the gaps between the pipes and the rest of the bumper.

I agree with you. I've had Corsa axle backs on most of my cars and the sound was perfect. Not too long ago a guy posted a killer deal on a Stainless Works axle back. The guy had his car upgraded (not actually a great description since it cost him $30K from Vengeance Racing, he's a Borla exhaust re-saler) so I got his pristine SWs kit and it's awesome! No drone and lots of deceleration pop with super WOT sound.

Brudda*Termite · 04-16-2020, 11:18 AM

Quote:

Originally Posted by ParisTNDude

I agree with you. I've had Corsa axle backs on most of my cars and the sound was perfect. Not too long ago a guy posted a killer deal on a Stainless Works axle back. The guy had his car upgraded (not actually a great description since it cost him $30K from Vengeance Racing, he's a Borla exhaust re-saler) so I got his pristine SWs kit and it's awesome! No drone and lots of deceleration pop with super WOT sound.

I'm looking at their axleback setup. What sound mode did you go with? I saw three different options on the website...

04-10-2020, 11:10 AM	#1
MackSteelPrivateEye Banned Drives: 6 on the Flo' Super Sport Join Date: Jan 2011 Location: md Posts: 1,924	Stock exhaust sound change Hi, 17' SS 6 spd with the dual mode stock setup. Coming up on 35k miles. And after videoing from when new to now I noticed my exhaust sound has changed. It seems to sound better, a little smoother, less raspy and poppy but more of a gravely sound now. Anyone else notice this? Perhaps the steel of the muffler had to season with age from hot to cold and carbon deposits. In any case I have no intension of ever replacing my exhaust now. I had it in the back of my mind but it never really made sense with the Dual mode setup which was an option anyway. Such a waste to throw away a good exhaust we paid extra for.

04-10-2020, 11:28 AM	#2
SomeGeoffGuy Drives: 2023 2SS Convertible Join Date: May 2009 Location: Metro Detroit Posts: 1,194	I totally agree - the stock exhaust sounds perfect. I used to work with the Camaro team, and you would not believe the amount of time they spent getting that exhaust sound just right. And then, at the very last minute they switched to an X from an H. They spent hours doing hole shots and sound comparisons to make sure that they didn't change the note that they had originally bought off on with the H. I don't think a stock exhaust has ever had more engineering time put into it than the 2016 Camaro. -Geoff __________________ '12 2SS RS Convertible - Traded in. '16 2SS Convertible - White on white, mag-ride, NPP, nav. Sold! '23 2SS Convertible -Same as above except orange.

04-12-2020, 03:18 PM	#8
s346k Drives: like an old lady Join Date: Jun 2012 Location: indiana Posts: 2,485	i changed the sound of my stock exhaust. i started by removing it. those are solo’s tips included with the muffler delete axle back. Attached Images __________________ 2016+ camaro: everyone’s first car

04-12-2020, 03:31 PM	#9
NA18CamaroSS Drives: 2018 Chevrolet Camaro 2SS 1LE 6M Join Date: Jul 2019 Location: California Posts: 297 View My Garage	Did a cat delete and the exhaust is pretty loud now. Thanks to Chevy for NPP-the stealth mode makes it tolerable when the wife has to ride shotgun. __________________ Bolt-ons.

04-12-2020, 04:52 PM	#11
Jaxcam02 Drives: 2017 Silverado/2017 ZL1 Join Date: Aug 2019 Location: Jax/Palatka FL Posts: 1,091	They look fine to me I just wish I could keep them clean. Can't wait until warranty is over and I can do corn __________________

04-11-2020, 04:54 PM	#6
CoeusAscended Drives: Chevrolet Camaro SS 2018 Join Date: Jun 2019 Location: Sweden Posts: 102	I love the sound of NPP but I wouldn't mind it being a bit deeper and more rumble, but dont know if that minor change is worth the 1+k for an AWE axleback though.. that being said, the stock tips need to be at least 4" in diameter to fill out the rear bumper well, honestly it looks kind of weird with the gaps between the pipes and the rest of the bumper.

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