NPP Exhaust - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Camaro23$$ · 06-07-2022, 11:55 PM

Hello, I thought I had read somewhere that the NPP exhaust on my 2013 ZL1 was a decent exhaust. That I could just do headers and leave the exhaust as it is adequate. Just want to make sure I’m remembering this correctly since I cant find the thread now.

Thanks in advance! Starting to look at doing some mods on my stock ZL1 so trying to choose what’s a priority and what isn’t.

Happy_Dan · 06-08-2022, 05:49 AM

I have the stock exhaust with headers and I think if I had anything else it would be too loud. It is still very loud when WOT! I am quite satisfied with the sound, but everyone is different. If you want obnoxious loud, you probably want a different exhaust.

Joe.G · 06-08-2022, 07:41 AM

I have the NPP with 1 7/8 LTH headers and Hi Flow cats. I have the Mild to Wild installed and leave the exhaust open most of the time ( I have it hooked to garage door opener buttons ) I really like the sound and see no reason to change it.

KaBoom1701 · 06-08-2022, 10:24 AM

Leave it stock.

owhite3003 · 06-08-2022, 01:30 PM

I dig the sound of the stock exhaust. I am running headers and catless.I also have my fused pulled. Sounds great with a cam and you don't pick up any hp with the axle back. I would put my money elsewhere. Enjoy that beast.

Robmnrd · 06-10-2022, 02:26 PM

+1 for headers and stock mufflers.

I've got that with hi-flow cats and the fuse pulled. I think it's basically perfect, though I would not mind a little more volume at idle and light acceleration. Nothing crazy, just a hair more would be perfect for me. The sound quality is great though, wouldn't change that for anything. Way better than all the Flowmaster Mustangs out there or even the muffler delete Mopars (most common ones around here).

DrkPhx · 06-11-2022, 10:02 AM

I run 2" headers with custom resonators in the place of the cats with a BBK x-pipe to the stock mufflers with a ADM exhaust controller. I really like the sound... no rasp with a good tone. I've tried multiple variations including catless pipes with the stock h-pipe and I like my current version the best.

sswt00ss · 06-12-2022, 10:51 AM

My ZL1 has Kooks LT's/ high-flow green cats, mated to the stock NPP w/ the fuse pulled. Perfect sound (for me). Minimal, if any drone and has a solid sound at WOT. Also get the burble and popping on decel.

PapaKlutch · 06-12-2022, 03:00 PM

Quote:

Originally Posted by Camaro23$$

Hello, I thought I had read somewhere that the NPP exhaust on my 2013 ZL1 was a decent exhaust. That I could just do headers and leave the exhaust as it is adequate. Just want to make sure I’m remembering this correctly since I cant find the thread now.

Thanks in advance! Starting to look at doing some mods on my stock ZL1 so trying to choose what’s a priority and what isn’t.

Keep the NPP. I run ARH headers, to their hi-flow cats, and their 3-inch X-pipe (AKA their Long System) to the NPP.

I have the Forza 3-way exhaust controller installed to force always open, always closed, or stock ECU control. Works great!

FasNuf · 06-12-2022, 08:37 PM

FasNuf is NPP. I like the sound of the stock mufflers catless with headers. It's just the right loudness with a nice tone and no drone. Opened up they're extremely loud and drone at highway speeds. A Mild 2 Wild isn't necessary, it's a simple grounding of a wire. No fuse pulling and no expensive hardware. A 2 or 3 way switch is all that's needed depending if you still want the factory auto mode.

Another shameless self promoting video is attached...

https://youtu.be/R1WfpAotXIY

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06-07-2022, 11:55 PM	#1
Camaro23$$ Drives: 2013 ZL1 & 2012 2SS Join Date: Nov 2021 Location: Loon Lake Posts: 71	NPP Exhaust Hello, I thought I had read somewhere that the NPP exhaust on my 2013 ZL1 was a decent exhaust. That I could just do headers and leave the exhaust as it is adequate. Just want to make sure I’m remembering this correctly since I cant find the thread now. Thanks in advance! Starting to look at doing some mods on my stock ZL1 so trying to choose what’s a priority and what isn’t. __________________ 2013 Chevy Camaro ZL1 Yellow Completely Stock. Brand New To Me 2012 Chevy Camaro 2SS/RS, LS3, GPI SS1 Cam, GPI Cam Kit, LS9 Head Gasket, Upgraded Valley Cover, Upgraded Crank Bolt, Lifter Trays, CHE Trunnion Kit, BTR Platinum Valve Springs, GPI Hardened Push Rods, GPI Phase Limiter, Upgraded Lifters, Corsa Dual Exhaust, Cold Air Intake, Headers.

06-08-2022, 07:41 AM	#3
Joe.G Drives: 2014 2SS/RS 6SP Ashen Grey Join Date: Aug 2021 Location: NY Posts: 1,264	I have the NPP with 1 7/8 LTH headers and Hi Flow cats. I have the Mild to Wild installed and leave the exhaust open most of the time ( I have it hooked to garage door opener buttons ) I really like the sound and see no reason to change it. __________________ GM 3.91/TrueTrac OEM ZL1 Rims, Brakes & Side Skirts.ACST4 Splitter/Deflectors NPP M2W,GM Short Throw,Remote Clutch reservoir GPI Ported Rod Mod,BO White PTB,CAI/JRE Scoop, Moroso Catch Can GC Aluminum DS Stainless Works Ceramic LTH/HiFlo Cats SCT X4 Dynosteve, Hotckis 1" Springs & Chassis Max Brace BMR Adjustable Swaybars,Trailing Arms, Adjustable Toe Rod, LCA & Z28 UCA Bushings Hendrix Solid Cradle Bushings Pedders Radius Rod Inserts Strut tower brace Hero Smoked Tail and 3rd Brake Light, Diode Dynamic SL1 Fog Lights AeroForce Dual gauge/Autometer pillar mount.

06-08-2022, 10:24 AM	#4
KaBoom1701 KaBoom1701 Drives: 13' ZL1 Red M6 Join Date: Dec 2012 Location: I.E. SoCal (Yucaipa) Posts: 8,630	Leave it stock. __________________ Mods: Roto-Fab Intake, WW Res. kit & Big Gulp Air Scoop, Elite Catch Can, ATI Super Damper & 18% OD Pulley, LF Idler pulley bracket, Metco CC breather, ID850 Injectors, Stainless Power Headers w/ ceramic coating, TR71X Spark Plugs, JMS Fuel Pump Booster, Bo White TB, Tuned by Ted @ Jannetty Racing, Ron Davis HX, D3 Reservoir, Pfadt 1" Springs, Moreno Camber Plates, ZL1 Addons Splitter guard washers, Tow Hook kit & rock guards, Hurst Shifter Billet Plus 6 Speed Short Shifter, ZL1 DRL lighting harness, ZL1 Recaro Seats.

06-12-2022, 08:37 PM	#10
FasNuf Drives: 2014 Camaro ZL1 Join Date: Jul 2019 Location: Oregon Posts: 1,615 View My Garage	FasNuf is NPP. I like the sound of the stock mufflers catless with headers. It's just the right loudness with a nice tone and no drone. Opened up they're extremely loud and drone at highway speeds. A Mild 2 Wild isn't necessary, it's a simple grounding of a wire. No fuse pulling and no expensive hardware. A 2 or 3 way switch is all that's needed depending if you still want the factory auto mode. Another shameless self promoting video is attached... https://youtu.be/R1WfpAotXIY . . .. . . __________________ . . . . https://www.youtube.com/channel/UCgN...etl17hA/videos

06-08-2022, 05:49 AM	#2
Happy_Dan Happy_Dan Drives: 2012 IOM Camaro ZL1 #569 Join Date: Dec 2011 Location: New Boston, NH Posts: 2,239	I have the stock exhaust with headers and I think if I had anything else it would be too loud. It is still very loud when WOT! I am quite satisfied with the sound, but everyone is different. If you want obnoxious loud, you probably want a different exhaust.

06-08-2022, 01:30 PM	#5
owhite3003 Z-BEAST Drives: 2013 JDP ZL-850 Track Spec ZL1, Join Date: Mar 2013 Location: Oregon City, OR Posts: 1,470	I dig the sound of the stock exhaust. I am running headers and catless.I also have my fused pulled. Sounds great with a cam and you don't pick up any hp with the axle back. I would put my money elsewhere. Enjoy that beast.

06-10-2022, 02:26 PM	#6
Robmnrd Drives: 2013 ZL1 Join Date: Aug 2018 Location: Texas Posts: 110	+1 for headers and stock mufflers. I've got that with hi-flow cats and the fuse pulled. I think it's basically perfect, though I would not mind a little more volume at idle and light acceleration. Nothing crazy, just a hair more would be perfect for me. The sound quality is great though, wouldn't change that for anything. Way better than all the Flowmaster Mustangs out there or even the muffler delete Mopars (most common ones around here).

06-11-2022, 10:02 AM	#7
DrkPhx Drives: 2013 Triple Black ZL1 / 2006 TB SS Join Date: Feb 2011 Location: MN Posts: 2,250	I run 2" headers with custom resonators in the place of the cats with a BBK x-pipe to the stock mufflers with a ADM exhaust controller. I really like the sound... no rasp with a good tone. I've tried multiple variations including catless pipes with the stock h-pipe and I like my current version the best.

06-12-2022, 10:51 AM	#8
sswt00ss Visualize°Design°Create Drives: '18 CTS-V & '13 ZL1 Join Date: Oct 2016 Location: DFW Posts: 44	My ZL1 has Kooks LT's/ high-flow green cats, mated to the stock NPP w/ the fuse pulled. Perfect sound (for me). Minimal, if any drone and has a solid sound at WOT. Also get the burble and popping on decel.