Need exhaust help please !

AlbanianLT1 · 09-01-2021, 10:17 AM

I have a 2021 with NPP, how do I go about making it louder ? Is an axle back gonna make it louder or will it sound similar to NPP? How do you go about making these cars louder ? Catback ?

FarmerFran · 09-01-2021, 10:28 AM

The NPP is "basically" a catback. Try going into the settings and set the exhaust to Track.

KyBoy · 09-01-2021, 10:51 AM

This

We see too far.

Crushin_LT1 · 09-01-2021, 10:52 AM

Quote:

Originally Posted by FarmerFran

The NPP is "basically" a catback. Try going into the settings and set the exhaust to Track.

He has the LT1 - no Track mode

Leave the car in sport mode, but these cars are somewhat quiet stock.

I like my Corsa NPP, rpetty amazing sound - significantly louder when valves are open, about stock track mode loud with valves closed.

willzilla · 09-01-2021, 10:54 AM

Some people pull the npp fuse so the valves stay fully open all of the time.

plus1zero · 09-01-2021, 11:00 AM

I cut my secondary cats and muffler delete. Thing was super loud all the time on my NPP. I dug it, some don't. Only thing is it's loud all the time, so if you want it to be in stealth mode that's a no-go at that point.

FarmerFran · 09-01-2021, 11:06 AM

Quote:

Originally Posted by Crushin_LT1

He has the LT1 - no Track mode

Leave the car in sport mode, but these cars are somewhat quiet stock.

I like my Corsa NPP, rpetty amazing sound - significantly louder when valves are open, about stock track mode loud with valves closed.

So there is no "track" option even in the Exhaust settings? Or a setting to hold them open? If not, pull the fuse and see if that helps

Malbjey · 09-01-2021, 11:09 AM

Quote:

Originally Posted by willzilla

Some people pull the npp fuse so the valves stay fully open all of the time.

This.

OP do the fuse pull first before shelling out $$$ for a full catback system.

If you like the sound after the fuse pull, you only need to put the fuse back in to return it to stock.

LT1ornothing · 09-01-2021, 11:16 AM

Quote:

Originally Posted by AlbanianLT1

I have a 2021 with NPP, how do I go about making it louder ? Is an axle back gonna make it louder or will it sound similar to NPP? How do you go about making these cars louder ? Catback ?

Another option (assuming you don't live in California) would be to remove the 2 rear catalytic converters. That should provide a deeper and louder sound.

AlbanianLT1 · 09-01-2021, 11:27 AM

Quote:

Originally Posted by KyBoy

This

We see too far.

Catless headers ? And which brand

KyBoy · 09-01-2021, 11:28 AM

Quote:

Originally Posted by AlbanianLT1

Catless headers ? And which brand

Yep, Kooks

We see too far.

AlbanianLT1 · 09-01-2021, 11:28 AM

Quote:

Originally Posted by Crushin_LT1

He has the LT1 - no Track mode

Leave the car in sport mode, but these cars are somewhat quiet stock.

I like my Corsa NPP, rpetty amazing sound - significantly louder when valves are open, about stock track mode loud with valves closed.

Did it get much louder ? Do you still have secondary cats ? I was thinking about the MBRP axle back or AWE track axle back but don’t know if it will be much louder than npp

AlbanianLT1 · 09-01-2021, 11:29 AM

Quote:

Originally Posted by plus1zero

I cut my secondary cats and muffler delete. Thing was super loud all the time on my NPP. I dug it, some don't. Only thing is it's loud all the time, so if you want it to be in stealth mode that's a no-go at that point.

Did you have NPP? Did taking off secondary cats make a big difference ?

AlbanianLT1 · 09-01-2021, 11:31 AM

Quote:

Originally Posted by KyBoy

Yep, Kooks

We see too far.

I wanna go catless but worried about warranty ? And like inspection, what’s your opinion on that ?

09-01-2021, 10:17 AM	#1
AlbanianLT1 Drives: 2021 Camaro LT1 Join Date: Aug 2021 Location: New Jersey Posts: 33	Need exhaust help please ! I have a 2021 with NPP, how do I go about making it louder ? Is an axle back gonna make it louder or will it sound similar to NPP? How do you go about making these cars louder ? Catback ?

09-01-2021, 10:28 AM	#2
FarmerFran Drives: 2023 ZL1 Vert M6 "Sharky" Join Date: Mar 2020 Location: Earth Posts: 4,032	The NPP is "basically" a catback. Try going into the settings and set the exhaust to Track. __________________ 2023 Camaro ZL1 Vert TR-6060 Sharkskin "Sharky" Firecracker Red Wrangler Willys, 3.6L eTorque, 850RE 8 speed automatic, 25W Willys package, Technology Group, Convenience Group (aka $600 garage door opener), Cold weather Group, Trailer Tow and HD electric group with AUX switches, 3 piece black freedom top.

09-01-2021, 10:51 AM	#3
KyBoy Drives: '17 2SS H50 Join Date: Mar 2016 Location: Louisa, Ky Posts: 3,952	This We see too far. __________________ 2017 H50-2SS-MN6-F55-NPP-RIK-WL4-IO6 1100 - 5/26 0000 - Cancelled - 7/5 Contacted Becky - 7/1 2000 - 7/5 3000 - 7/6 3000 - 7/11 TPW 8/1 3100 - 7/18 TPW 8/1 3300 - 7/20 3400 - 7/21 Built - 8/2 - PS 1,182/1 of 699US 4300 - 8/3 5000 - 8/5 6000 - 8/13

09-01-2021, 10:54 AM	#5
willzilla D3RPZILLA Drives: 2021 Camaro ZL1 a10 Join Date: Aug 2020 Location: San Antonio, TX Posts: 642 View My Garage	Some people pull the npp fuse so the valves stay fully open all of the time. __________________ 2021 Camaro ZL1 Satin Steel w/a10/PDR/CF/Red Belts/Navigation Website: z1lla.com \| YouTube: youtube.d3rpzilla.com YouTube Playlists: Performance Mods \| Interior & Exterior Mods \| Other Mods

09-01-2021, 11:00 AM	#6
plus1zero Don't tread on me Drives: 23 Sierra X31, Past 2017 Fifty 2SS Join Date: Nov 2012 Location: United States Posts: 846	I cut my secondary cats and muffler delete. Thing was super loud all the time on my NPP. I dug it, some don't. Only thing is it's loud all the time, so if you want it to be in stealth mode that's a no-go at that point.

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